| 单词 | gneiss |
| 例句 | In front of me, a sheer wall of stippled gneiss. Coming Soon to an American Cliff Near You: ‘Via Ferrata’ Routes 2022-08-22T04:00:00Z Stories, in that sly way, are his thing, and in his daily life he’s not averse to mussing around with geological terms like “hornfels” and “gneiss.” He Can’t Save His Daughter. Can He Save Himself? 2020-05-05T04:00:00Z By trip’s end, we could read the canyon’s intricate strata of gneiss, granite, schist, shale and travertine like the hands on a billion-year clock. Older adventurers stay young at heart rafting the Grand Canyon’s rapids 2016-01-07T05:00:00Z She chiseled from boulders One head and two shoulders: Now Anne has a pretty gneiss bust. Style Invitational Week 1296: A, we’re adorbs — a poetry contest 2018-09-06T04:00:00Z “That geologist’s now off my list. What he sold wasn’t gneiss At his ‘rock-bottom price,’ Just a typical lode of pure schist. Style Invitational Week 1193: Poedtry II, plus winning limericks 2016-09-15T04:00:00Z Lewisian gneiss are the oldest rocks in Britain – and some of the oldest in the world. Scotland's rocky road: a journey to the edge of Lewis – a photo essay 2017-06-28T04:00:00Z In he studies Britain geologically, exploring the relation between peat and gneiss, chalk and sand, asking how we can learn to understand the country differently. The Old Ways by Robert Macfarlane – review 2012-05-31T07:00:02Z The ridges are gneiss and schist; the valleys, marble, worn down through various glaciation events. When the Bronx Was a Forest: Stroll Through the Centuries 2020-08-05T04:00:00Z Examples would be granite, gneiss, volcanic rock, and sedimentary rock that has not been folded. Physical Geology 2015-01-01T00:00:00Z Next, the gneiss, fault A, and batholith B were eroded forming a nonconformity as shown with the wavy line. An Introduction to Geology 2017-01-01T00:00:00Z The dark, blocky cylinder appears to comprise a roughly fifty–fifty mix of ice and a metamorphic rock called gneiss, Talalay says. Chinese crew extract first rock from beneath East Antarctic ice in 60 years 2019-03-04T05:00:00Z The team of researchers studied a type of rock called Idiwhaa gneiss, which is more than 4 billion years old, found in northwest Canada and the oldest large swath of rock on Earth. Meteorites May Have Created Some of Earth's Oldest Rocks 2018-08-14T04:00:00Z They argue that the rocks that are supposedly shot through with the gneiss are not, in fact, older than it. Oldest traces of life on Earth may lurk in Canadian rocks 2017-09-26T04:00:00Z Foliation is a key feature of metamorphic rocks formed under directed pressure; foliated metamorphic rocks include slate, phyllite, schist, and gneiss. Physical Geology 2015-01-01T00:00:00Z These crystalline changes create identifying textures, which is shown in the figure below comparing the phaneritic texture of igneous granite with the foliated texture of metamorphic gneiss. An Introduction to Geology 2017-01-01T00:00:00Z No granite nearby, the closest would be gneiss that occurs in areas. New York Today: How to Build a Subway 2016-10-24T04:00:00Z The rock was a sturdy gray gneiss, streaked with black. The Long Dig 2008-09-15T04:00:00Z They say that the graphite containing hints of life must be at least that old, because it lies within rocks that are apparently shot through with — and thus presumably older than — the 3.95-billion-year-old gneiss. Oldest traces of life on Earth may lurk in Canadian rocks 2017-09-26T04:00:00Z At 15 km to 20 km, larger micas form to produce schist, and at 20 km to 25 km amphibole, feldspar, and quartz form to produce gneiss. Physical Geology 2015-01-01T00:00:00Z A rock with this texture is called gneiss. An Introduction to Geology 2017-01-01T00:00:00Z The rock is a crumbling gneiss that, combined with the severe angle of incline, forces you to constantly maintain perfect balance, prepared for a hand- or foothold to give way at any moment. How the Matterhorn Created Modern Mountaineering 150 Years Ago 2015-07-14T04:00:00Z One June day three years ago, five miles south of the village of Amsteg, two worms were working their way south through a layer of granite and gneiss more than a mile underground. The Long Dig 2008-09-15T04:00:00Z Built from locally quarried gray gneiss, with walls three feet thick, the five-story central building includes a chapel filled with intricate wooden sculptures and stained-glass windows. Preservationists Fight to Save a Former Asylum in New Jersey 2015-04-03T04:00:00Z In gneiss, the minerals may have separated into bands of different colours. Physical Geology 2015-01-01T00:00:00Z Since gneisses form at the highest temperatures and pressures, some partial melting may occur. An Introduction to Geology 2017-01-01T00:00:00Z Made of marble, granite, and bluestone gneiss, the monument to the first US president is also the world's tallest stone structure. US monument 'shrinks' after survey 2015-02-16T05:00:00Z Atop these gneiss layers are younger deposits of basalt, which are were formed by ancient lava flows. Laikipia Plateau: I have arrived 2013-02-04T23:15:06.263Z The very oldest rocks in this region are the Lewisian gneisses, a strange looking crystalline stone that seems to express its tortured history in its appearance. Time Is Not Made to Flow in Vain: Eternity and Apocalypse in Assynt and Mars 2012-10-03T17:45:06.937Z Most gneiss has little or no mica because it forms at temperatures higher than those under which micas are stable. Physical Geology 2015-01-01T00:00:00Z The sequence slate → phyllite → schist → gneiss illustrates an increasing metamorphic grade. An Introduction to Geology 2017-01-01T00:00:00Z I sat down on a slab of granitic gneiss and leaned against a warm boulder. Following the Ice: Is this Global Warming? 2012-07-12T19:45:02.967Z The Outer Hebrides being almost entirely composed of gneiss the epithet suitably serves them, but, strictly speaking, only the more northerly of the Inner Hebrides may be distinguished as Trap Islands. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 "Hearing" to "Helmond" 2012-04-25T02:00:53.567Z You’ll find sapphires in some volcanic fields, and in metamorphic rocks like gneiss, mica schist and sometimes marble. The Real Heart of the Ocean 2012-04-14T14:45:05.383Z Schist and gneiss can be named on the basis of important minerals that are present. Physical Geology 2015-01-01T00:00:00Z The sequence begins with the folded metamorphic gneiss on the bottom. An Introduction to Geology 2017-01-01T00:00:00Z The former—mostly gneiss—is far more rugged and interesting, and there is infinitely more of the latter. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z Heulandite occurs with stilbite and other zeolites in the amygdaloidal cavities of basaltic volcanic rocks, and occasionally in gneiss and metalliferous veins. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4 "Hero" to "Hindu Chronology" 2012-04-04T02:00:56.447Z Some of the gneiss and schist in these areas may have begun life as sedimentary rocks, but they’ve been so transformed it’s hard to know for sure. M lange et Trois: A Trip Across Subduction Zone Madness 2012-03-07T22:15:00.213Z Similarly, a gneiss that originated as basalt and is dominated by amphibole, is an amphibole gneiss or, more accurately, an amphibolite. Physical Geology 2015-01-01T00:00:00Z Since batholith B cuts both the gneiss and fault A, batholith B is younger than the other two rock formations. An Introduction to Geology 2017-01-01T00:00:00Z We passed villages all the way, villages brown in colour and built of a brown gneiss, around which grew fields of barley and mustard. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z A few paces from this was a single pillar of gneiss in a rough state, which was from fourteen to sixteen feet high. Ophiolatreia An Account of the Rites and Mysteries Connected with the Origin, Rise, and Development of Serpent Worship in Various Parts of the World 2012-03-01T03:00:28.303Z That of the plateaux and hills above 2,000, or sometimes descending to 1,000 feet, which is due to the disintegration of gneiss and granite rocks. West African studies 2012-02-15T03:00:28.537Z Smaller but well-developed crystals have been found on gneiss at Mt. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 9 "Dagupan" to "David" 2012-02-11T03:03:39.807Z Dating a mineral within the granite would give the crystallization age of the rock while dating the gneiss might reflect the timing of metamorphism. An Introduction to Geology 2017-01-01T00:00:00Z We had left all the granites and slates behind and had suddenly come into the zone of the gneiss, which extended many miles to the South. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z The greater part are still standing; they consist, with a few exceptions, of a single piece of gneiss in the rough state in which they were quarried. Ophiolatreia An Account of the Rites and Mysteries Connected with the Origin, Rise, and Development of Serpent Worship in Various Parts of the World 2012-03-01T03:00:28.303Z The main ridge of the mountains is of gneiss rock; yet, to-day, parallel ridges of a rock, nearly allied to basalt, have abounded. Oregon and Eldorado or, Romance of the Rivers 2012-02-07T03:00:09.010Z Off I went, armed with just enough rudimentary information to be dangerous, like the fact that the three principal rock types underlying New York City are Fordham gneiss, Manhattan schist and Inwood marble. City Room: Colliding Continents Created the Rock Formation in a Children's Playground 2012-02-05T19:30:17Z There it forms a large deposit, in a granitic vein running through gneiss, and is accompanied by quartz, siderite, galena, blende, chalcopyrite, &c. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" 2012-01-22T03:00:24.397Z M. Duponchel stated that the principal portion of the line would rest during nearly its whole extent on layers of sand, and toward the end on primitive volcanic rocks, granite, gneiss, etc. Scientific American, Vol. XXXIX.?No. 24. [New Series.], December 14, 1878 A Weekly Journal Of Practical Information, Art, Science, Mechanics, Chemistry, And Manufactures 2012-01-05T03:00:31.783Z What is the description of the rock formation, trachytic, granitic, or gneiss, or are slate or sandstone the characteristic formations? Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume III (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. 2012-01-04T03:00:31.713Z The steep, final cone of the rock consists of a granulitic gneiss of varying texture from coarse to fine, and abounding in garnets. Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume I (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. 2012-01-02T03:00:25.873Z It is essentially metamorphic and occurs with gneisses, schists and granulites, especially in the Scandinavian peninsula, where it is regarded as being very characteristic of certain horizons. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z The surface of a large part of the colony is composed of gneiss, and of gneissose granite, which is seen in large water-worn bosses in the river beds. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z The tertiary formation is followed by an azoic formation of gneiss, mica slate, and phylada with large intrusions of granite. Guatemala, the country of the future 2011-12-12T03:00:29.630Z Granites and gneisses crop out along the Bug, Cretaceous, and especially Tertiary, deposits elsewhere. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z The gneiss is uniformly of a species not often met with, studded with garnets, and between its strata are inserted single beds of hornblende-gneiss and splinters of pure hornblende, as also granulite-gneiss and pure granulite. Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume I (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. 2012-01-02T03:00:25.873Z Thus it is common to find pieces of sandstone, limestone, quartzite, granite, gneiss, schist, etc., intimately commingled in the drift, wherever the ice which produced it passed over formations of these several sorts of rock. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In British Guiana a series of conglomerates, red and white sandstone and red shale, rests upon the gneiss and forms the remarkable table-topped mountains Roraima, Kukenaam, &c. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z So we resumed our harness and departed; not, however, before a huge cairn had been built out of the blocks of gneiss with which the summit is bestrewn. The Ascent of the Matterhorn 2011-11-19T03:00:23.233Z They reach 1000 ft. in thickness, occupying undulating hollows in the underlying gneiss, and dip towards the Noursoak Peninsula at 20�, when the overlying Atanakerdluk strata come in. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z Another similar block of gneiss was transformed into a stone couch, and is called Dharma Rajah's bed, at the upper end of which, near the head, a tiger is crouched to guard it. Narrative of the Circumnavigation of the Globe by the Austrian Frigate Novara, Volume I (Commodore B. Von Wullerstorf-Urbair,) Undertaken by Order of the Imperial Government in the Years 1857, 1858, & 1859, Under the Immediate Auspices of His I. and R. Highness the Archduke Ferdinand Maximilian, Commander-In-Chief of the Austrian Navy. 2012-01-02T03:00:25.873Z Among the stones in the drift at these exposures are limestone, sandstone, quartzite, diabase, gabbro, gneiss, granite, schist, and porphyry, together with pieces of flint and chert. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The rocks consist chiefly of granite, gneiss, schists, quartzite, porphyry and diorite. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Sillimanite and andalusite are not infrequent ingredients of gneiss, and their presence has been accounted for in more than one way. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Laurentian gneiss forms the greatest mass of the exposed rocks of the country bare of ice. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 5 "Greek Law" to "Ground-Squirrel" 2011-12-05T03:00:51.527Z This stream rushes over a precipitous mass of granite, gneiss, and mica slate rocks, precipitating itself by a fall of twenty-five feet into a rocky basin below. Forest Life and Forest Trees: comprising winter camp-life among the loggers, and wild-wood adventure. with Descriptions of lumbering operations on the various rivers of Maine and New Brunswick 2011-10-11T02:01:03.847Z The land is composed of gneiss, and the gravelly shore is low. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z The parallel banded structures of many granites, which may be original or due to crushing, connect these rocks with the granite gneisses or orthogneisses. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Many varieties of gneiss have received specific names according to the minerals they consist of and the structural peculiarities they exhibit. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Their geological formation is granite, with gneiss and mica slate, with clay slate, hornblende and primitive limestone overlying. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 8 "Germany" to "Gibson, William" 2011-10-05T02:00:17.763Z Its sides are covered with huge blocks of gneiss which have fallen from the top, forming long dens and passages between them. Forest Life and Forest Trees: comprising winter camp-life among the loggers, and wild-wood adventure. with Descriptions of lumbering operations on the various rivers of Maine and New Brunswick 2011-10-11T02:01:03.847Z Everywhere upon the shores of the island I noticed boulders of dark gneiss; upon the west coast they were generally small, and of a dark gray color. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z The graphite found in granite and in veins in gneiss, as well as that contained in meteoric irons, cannot have had such an origin. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z These veinlets produce that alternation in mineral composition and banded structure which are essential in gneisses. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z The geological formation is trap in the northern and gneiss in the southern section. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 8 "Germany" to "Gibson, William" 2011-10-05T02:00:17.763Z It is composed of gneiss, curiously crossed in every direction by veins of quartz. Forest Life and Forest Trees: comprising winter camp-life among the loggers, and wild-wood adventure. with Descriptions of lumbering operations on the various rivers of Maine and New Brunswick 2011-10-11T02:01:03.847Z This mica schist passes into a white gneiss, composed of quartz, white felspar, and black mica, penetrated by veins, coarsely crystallised, of the same minerals. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z At one time these rocks were regarded as Archean gneisses of a special type. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Hence, though most gneisses are Archean, all gneisses are not necessarily so. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z They consist chiefly of gneiss and schist, with granite and other eruptive rocks. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 2011-09-26T02:00:25.313Z These truncated mounds are composed mainly of gneiss, sometimes of quartzite, and in the northern portion the chain becomes more fertile and of a clayey, schistose nature. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z The prevailing rock is grey gneiss, generally dipping at an angle of 35° to the west. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z A large part of the highlands of Scotland consists of paragranulites of this kind, which have received the group name of “Moine gneisses.” Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z The commonest and most important types of gneiss are the mica-gneisses. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z "Very pretty specimens of white, rose, and smoky quartz, black and white mica, gneiss, hornblende, and a few others, that I collected on that very high hill, west of here." Mind Amongst the Spindles 2011-09-20T02:00:13.677Z The cliffs upon this mountain are formed chiefly of gneiss, which breaks up into blocks, owing to numerous transverse fissures across the lamination. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z The rock is gneiss; there is also much granite. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z They range from the finest silky slates, or phyllites, up to the coarsest gneisses, which in hand-specimens can hardly be distinguished from granites. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z They are sometimes subdivided into granite gneiss, diorite gneiss, syenite gneiss and so on. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z As an abrasive agent it is worked at several localities in the United States, especially in New York State, along the borders of the Adirondacks, where it occurs in limestone and in gneiss. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z Mr. Distenfeld, 48, is a sculptor who prefers granite gneiss -– the banded metamorphic rock found beneath swaths of New York City -– and in the Nostrand pit he saw a boulder of it. City Room: With Big, Heavy Rocks, a Man Turns a Nuissance Into a Niche 2011-08-14T21:58:35Z It is composed of quartz, red felspar, and dark green chlorite; and is accompanied with gneiss of the same composition. In the Arctic Seas A Narrative of the Discovery of the Fate of Sir John Franklin and his Companions 2011-10-10T02:00:18.377Z In many places gneisses that possess a thoroughly typical foliation have been found to pierce ancient sedimentary formations as intrusive bosses and veins. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z There are also many examples of gneisses of mixed or synthetic origin. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Garnets are very widely distributed, occurring in crystalline schists, gneiss, granite, metamorphic limestone, serpentine, and occasionally in volcanic rocks. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z I know nothing more delightful than to lie full length on a cliff and feel the fragments of gneiss tickling my ribs while I gaze seaward. The Red Room 2011-08-13T02:00:26.943Z The former may be conveniently divided into three members: First, the Bojian, or Ottawa gneiss, consisting of stratified granite rocks, usually of a red colour, and of very great thickness. The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants 2011-06-01T02:00:24.880Z From the finest silky phyllites a graduation may be traced through successively coarser mica-schists, until we reach the almost granitic texture of the coarsest gneisses. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Many gneisses are undoubtedly sedimentary rocks that have been brought to their present state by such agents of metamorphism as heat, movement, crushing and recrystallization. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z A broad mass of ice-worn gneiss and granite lies between Lough Corrib and Galway Bay, cut off so sharply at the sea as to suggest the presence of an east-and-west line of fracture. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z The oldest rocks, the gneisses and schists of the Archean period, form nearly the whole of the Central Plateau, and are also exposed in the axes of the folds in Brittany. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 7 "Fox, George" to "France" 2011-05-15T02:00:07.897Z It is found interlaminated with gneiss, as carbonaceous and bituminous matters are found in the shales of the ordinary fossiliferous rocks, where these substances are known to be of organic origin. The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants 2011-06-01T02:00:24.880Z There is indeed every reason to believe that such gneisses were probably originally true granites, and that their foliation and recrystallization have been the result of metamorphism. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z Northward of Cape Cod, the rocks adjacent to the ocean are mostly hard and resistant, consisting largely of schist, gneiss, granite, trap, etc., which when undercut by the waves stand as bold cliffs and headlands. North America 2011-05-05T02:00:20.027Z It is generally composed of gneiss and mica schist. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z This county includes in the north an area of the gneiss that is discussed under county Donegal, and, west of Omagh, a metamorphic region that stretches in from the central axis of Tyrone. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 3 "Fenton, Edward" to "Finistere" 2011-03-14T03:01:00.580Z Still it is not impossible that some of the beds which are now graphitic gneisses may originally have been similar to the bituminous shales, coals, or underclays of the coal formation. The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants 2011-06-01T02:00:24.880Z Yet they included granite, gneiss, basalt, porphyry and serpentine, which, even in his own day, were by many observers correctly regarded as of igneous origin. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z The rocks forming this earliest known land in the Western Hemisphere consist of crystalline schists, gneisses, and granite, which are considered by some geologists at least as having resulted from the metamorphism of sedimentary beds. North America 2011-05-05T02:00:20.027Z The rocks of this ancient chain have since been converted into gneiss, and they were folded and denuded before the deposition of the oldest known fossiliferous sediments. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 8 "Ethiopia" to "Evangelical Association" 2011-03-05T03:00:24.537Z On the Deerfield River, a tributary of the Connecticut, we have a gulf called the Ghor, eight miles long and several hundred feet deep, cut crosswise through the mica slate and gneiss by the stream. The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z Secondly, the Middle Laurentian, the greater part of which consists of gneiss, but containing important beds of other rocks, as quartzite, iron ore, and limestone. The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants 2011-06-01T02:00:24.880Z Immediately below this bed there were found pebbles, and still lower down was a bed of gravel containing rounded stones of sandstone and gneiss from the Black Forest. A Manual of the Antiquity of Man 2011-02-21T03:00:07.080Z Metamorphic rocks, such as gneiss, schist, some granites, etc. North America 2011-05-05T02:00:20.027Z When the bedding of gneiss becomes entirely obliterated, it is often difficult to distinguish that rock from granite, and in many cases it appears to pass into a true granite. Geology 2011-02-20T03:00:12.660Z The oldest granite and gneiss, which must have been the earliest rocks produced, are just as invariable in their composition as the most recent salt formed in the laboratory. The Religion of Geology and Its Connected Sciences 2011-02-28T03:00:28.890Z This consists in great part of Labadorite, or lime feldspar, but has also beds of ordinary gneiss, limestone, and iron ore. The Chain of Life in Geological Time A Sketch of the Origin and Succession of Animals and Plants 2011-06-01T02:00:24.880Z They occur principally among the schists, slates and gneisses of such districts as the Scottish Highlands, the north-west of Ireland, Brittany, the Harz, the Alps, and the crystalline ranges of eastern N. America. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z But rocks of practically any age may be altered in the several ways mentioned above, and the resulting gneisses, schists, etc., be indistinguishable from those of the Archean. North America 2011-05-05T02:00:20.027Z Thus, we find bedded gneiss passes often, by insensible gradations, into true amorphous granite. Geology 2011-02-20T03:00:12.660Z "Again, a grand mass of gneiss and granite, eleven hundred feet high, would present itself, feathered with beautiful evergreens, with every runnel and rivulet in its clefts fringed with graceful wild date trees." The World and Its People: Book VII Views in Africa 2011-02-13T03:00:17.920Z The emery is found as detached blocks in a reddish soil, and as rounded masses embedded in a crystalline limestone associated with mica-schist, gneiss and granite. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Garnet is very common in our glacial clasts and in the basement gneisses we collected near the Ascent Glacier camp. Scientist at Work: On Last Field Day, a South Pole Detour 2011-01-12T17:17:10Z In fact, some of the metamorphosed rocks of North America, as certain gneisses, schists, etc., of the Sierra Nevada and Cascade Mountains, are known to be of Mesozoic and even Cenozoic age. North America 2011-05-05T02:00:20.027Z Some geologists consider it to be invariably an igneous rock; but, as just stated, it sometimes passes into gneiss in such a way as to lead us to infer its metamorphic origin. Geology 2011-02-20T03:00:12.660Z A complicated, highly deformed gneiss in the Milan Ridge near Ascent Glacier camp. Scientist at Work: Deep in Antarctica, Three Big Challenges 2011-01-05T22:21:44Z Near Grantown there is a group locally developed, comprising crystalline limestone with tremolite, kyanite gneiss, muscovite-biotite-schist and quartzite, the age and relations of which are still uncertain. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 "Electrostatics" to "Engis" 2011-02-06T03:00:53.093Z Some of the clasts, literally boulders, show the same kind of complexity that we see in outcrop, with veins of igneous material cutting across older, deformed gneisses. Scientist at Work: Unraveling the History Beneath the Ice 2010-12-28T21:28:12Z Common examples of metamorphic rocks are mica, schist, gneiss, 324 statuary marble, certain granites, etc. North America 2011-05-05T02:00:20.027Z Hence the boulder clay of the lowland districts is abundantly charged with boulders of schistose grit, slate, gneiss and granite derived from areas lying far to the north-west. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z The greater part of the mass is composed of gneiss and schists. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" We soon passed the limits of grass and rhododendrons, and reached the slabs of gneiss which overspread the summit of the ridge, lying one upon the other like coin upon the table of a money-changer. The Glaciers of the Alps Being a narrative of excursions and ascents, etc. Dylan Taylor examining some of the metamorphic gneisses at Camp Ridge. Scientist at Work: Unraveling the History Beneath the Ice 2010-12-28T21:28:12Z The rocks are mainly crystalline schist, gneiss, granite, etc., together with igneous intrusions, all of which have been intensely folded, crumpled, and broken. North America 2011-05-05T02:00:20.027Z The Cordillera, which bounds them on the west, is formed of folded beds, while the Sierras which rise in their midst, consist mainly of gneiss, granite and schist. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 5 "Arculf" to "Armour, Philip" Geologically they belong to the primitive formation—granite, compact dark blue slate, gneiss and syenite. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" The nucleus of this plateau consists of gneiss and granite. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis The rocks of the central zone consist of granite, gneiss, hornblende, mica slate, and other slates and schists. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide No satisfactory boundary between these hills of gneiss, schist, and allied metamorphic rocks, and the others of the same general character in the neighbouring portions of New York and New Jersey, has been determined. North America 2011-05-05T02:00:20.027Z Another common mode of occurrence of apatite is in metamorphic crystalline rocks, especially in crystalline limestones: in eastern Canada extensive beds of apatite occur in the limestones associated with the Laurentian gneisses. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" The pre-Cambrian cores of the eastern and central Pyrenees, consisting of gneiss, schists and altered limestones, are presumably of Archean age. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" Jeff passed within the walls, through frowning gates of porphyry and gneiss, and urged Alibi up the cañon. Bransford of Rainbow Range Originally Published under the title of Bransford in Arcadia, or, The Little Eohippus In the course of a walk of two miles over these hills, the only rock I observed was granite, verging in a few places towards gneiss, and generally whitish, with black mica. Narrative of a Second Expedition to the Shores of the Polar Sea At various elevations the gneiss may be found intersected by veins of trap rock, upheaved whilst in a state of fusion subsequent to the consolidation of the former. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Still another mode of occurrence is presented by beautifully developed and transparent crystals found with crystals of felspar and quartz lining the crevices in the gneiss of the Alps. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" In India the system is represented by the Bundelkhand gneiss and the central older gneisses of the Himalayas. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" It was only by chance—a real chance—that, clambering on the gatepost cliffs to examine a curious whorl of gneiss, he happened to see Mr. Long as he returned. Bransford of Rainbow Range Originally Published under the title of Bransford in Arcadia, or, The Little Eohippus The most prevalent rock in the chain is gneiss; but there is also granite and mica-slate, together with numerous beds of amphibolic rocks. Narrative of a Second Expedition to the Shores of the Polar Sea Laterite, known in Ceylon as kabuk, a product of disintegrated gneiss, exists in vast quantities in many parts, and is quarried for building purposes. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" In the north of Bundelkhand the prevailing rock is gneiss and quartz. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" It is more than likely that certain occurrences of gneiss and schist, at present regarded as Archean, may prove on fuller examination to be metamorphosed representatives of younger periods. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" The greater part of the island seems to be formed of gneiss and other crystalline rocks. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" Those rocks which are nether-formed, or which have not assumed their present form and structure at the surface, such as granite, gneiss, &c. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Chabazite occurs with other zeolites in the amygdaloidal cavities of basaltic rocks; occasionally it has been found in gneisses and schists. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" South of the plateau, in the state of Oaxaca, low mountain ridges composed of granites and gneisses, supposed to be of Archaean age, begin to appear. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6 "Celtes, Konrad" to "Ceramics" In the Menominee region of Michigan and Wisconsin, the Quinnesec schist series mainly consist of schistose quartz porphyry with associated gneisses. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" Deep down and far away was the purple gneiss of the gorge, ribboned with granite, then on either side of the river rose the various architectural forms and structures of the canyon. The Frontier Boys in the Grand Canyon A Search for Treasure The hypogene or primary schists, as they are termed, such as gneiss, mica-schist, and others, cannot be split into an indefinite number of parallel laminæ like rocks which have a true slaty cleavage. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology The great geological feature of the island is the profusion of gneiss, overlaid in many places in the interior by extensive beds of dolomitic limestone. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" The foreign boulders of granite, gneiss, &c., found in the coal-measures of some districts, are quite as likely to have been dropped by rafts of vegetation as to have been carried by floating icebergs. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" In Japan, in the Abukuma plateau, there is much granite, gneiss and schist which may be of this age. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" This northern projection is formed of Laurentian gneiss, the only instance in Nova Scotia of this formation, and is fringed by a narrow border of carboniferous rocks. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2 "Camorra" to "Cape Colony" The term, which includes both the plutonic and metamorphic rocks, is substituted for primary, because some members of both these classes, such as granite and gneiss, are posterior to many secondary or fossiliferous rocks. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology This formation appears to be of great thickness; and when, as is not often the case, the under-surface of the gneiss series is exposed, it is invariably found resting on granite. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" Throughout, the rocks are crystalline and include gneiss, schist, and marble--the metamorphosed equivalents of a large variety of ancient sedimentary and igneous rocks. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 Africa contains enormous tracts of crystalline gneisses, granites and schists, and some of these are almost certainly of Archean age; but in the present state of our knowledge it is impossible to speak more exactly. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" The town is built on a low bank of gneiss and micaceous slate which runs out into the sea and affords some protection at the landing-place against the violence of the surf. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2 "Camorra" to "Cape Colony" Consolidation of strata.—This subject may be considered, first in reference to the fossiliferous strata; and, secondly, in reference to those crystalline and stratified rocks which contain no organic remains, such as gneiss and mica-schist. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Geology.—The oldest rocks, forming the greater mass of the hinterland, are gneisses, schists and granites of Archaean age. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" The lower valley of Rocky River is, however, mapped as Becket gneiss and Thomaston granite gneiss. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 In the southern mass near Pettigo, once regarded as Archaean and fundamental, residual “eyes” of the hornblendic rocks that are associated with the Dalradian series remain floating, as it were, in the gneiss. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" Among the commonest associates of the diamond are quartz, topaz, tourmaline, rutile, zircon, magnetite, garnet, spinel and other minerals which are common accessory constituents of granite, gneiss and the crystalline schists. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" The bed of the river, on which the piers rested, was composed of rolled pieces of granite and gneiss. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology In beds where clay mingled with sand, in layers, gneiss was formed. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place The Housatonic, however, instead of choosing the broad lowland in the limestone formation, spread invitingly before it, turns aside and flows through a narrow gorge cut in resistant gneiss, schist, and igneous intrusives. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 The intruding granite, which predominates in the north-west, has frequently united with the metamorphic series to form composite gneiss. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" Large deposits of corundum exist in the United States, especially in N. Carolina and Georgia, where they are associated with peridotites, often near contact with gneiss. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" A stratified division of hypogene rocks, highly crystalline, such as gneiss and mica-schist, and so named because they have been altered by plutonic action. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology A banded granite the colours of which give it a stratified appearance is called a gneiss. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Even the narrow valleys in the upland southwest of Danbury are to be accounted for by the presence of thin lenses of limestone embedded in gneiss and schist. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 Low mountains of granite and gneiss rise on both sides, and the average width of the lake is less than one mile. With the World's Great Travellers, Volume 1 It is composed of gneiss, is generally rather flat, save in the west where Ben Hogh reaches a height of 339 ft., and has several lakes. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" Werner invented a new language to express his divisions of rocks, and some of his technical terms, such as grauwacke, gneiss, and others, passed current in every country in Europe. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology The cobalt ores at these localities occur with pyrites and chalcopyrite as bands in gneiss. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" The gneiss was found to be characteristic of the high ridges and schist to be more common in the valleys. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 The rocks chiefly are gneisses, granites, metamorphosed marbles, quartzites, and slates, all of them far too old to bear fossils or coal. Our Southern Highlanders The oldest rocks are gneisses and schists, together with granite and other eruptive rocks. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" So firmly did these barnacles adhere to the gneiss, that I broke off portions of the rock with the shells attached. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology In like manner, the Matterhorn is cut out of a block of nearly horizontal beds of gneiss. Modern Painters, Volume IV (of V) Chrysoberyl is known as a constituent of certain kinds of granite, pegmatite and gneiss. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" These horizontal mills still exist, however—at least they did so only two years ago—in the gneiss region of Assynt. My Schools and Schoolmasters or The Story of my Education. The Central Cordillera is the direct continuation of the Eastern Cordillera of Ecuador, and is formed chiefly of gneiss and other crystalline rocks, but sedimentary deposits of Cretaceous age also occur. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" The northernmost group of the British islands, the Shetland, are composed of a great variety of rocks, including granite, gneiss, mica-slate, serpentine, greenstone, and many others, with some secondary rocks, chiefly sandstone and conglomerate. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology The true gneiss beds dipping down in the direction G H, the point H being the same as h in Plate 33. Modern Painters, Volume IV (of V) The Eddystone Rocks consist of twenty-two gneiss reefs extending about six hundred and fifty feet, in front of the entrance to Plymouth Sound. England, Picturesque and Descriptive A Reminiscence of Foreign Travel Most of the stratified primary rocks make but indifferent building materials; and in the immediate neighbourhood of our work I could find only one of the worst of the class—the schistose gneiss. My Schools and Schoolmasters or The Story of my Education. Fine-grained gneiss, composed of white quartz, white feldspar, and black mica, with a vein containing hornblend and crystals of feldspar. Account of a Voyage of Discovery to the West Coast of Corea, and the Great Loo-Choo Island In central France, a district where the primary rocks are unusually destitute of limestone, springs copiously charged with carbonate of lime rise up through the granite and gneiss. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology It is not easy to get any consistent series of measurements of the slope of these gneiss beds; for, although parallel on the great scale, they admit many varieties of dip in minor projections. Modern Painters, Volume IV (of V) His men were engaged in blasting a mass of very hard rock—gneiss, he called it—which ran across the line. Harper's Young People, June 29, 1880 An Illustrated Weekly To the south lay the trap islands; to the north and west, the gneiss ones. My Schools and Schoolmasters or The Story of my Education. Very fine-grained gneiss, composed of white quartz, flesh-coloured feldspar, and black mica. Account of a Voyage of Discovery to the West Coast of Corea, and the Great Loo-Choo Island Not far off is the small volcanic cone of Chaluzet, which once broke up through the gneiss, and sent forth a lava stream. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology But what most puzzled me was the intense straightness of the lines of the gneiss beds, dipping, as it seemed, under the Mont Blanc. Modern Painters, Volume IV (of V) Unlike many of the granitic gneisses, it is a fine solid stone, and would cut well. The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland Such is peculiarly the case with the fundamental or gneiss deposits of the period. The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed If so, the lye would be widened, the huge gneiss rock that bridged it gone, and their retreat down the glacier cut off! The Plant Hunters Adventures Among the Himalaya Mountains Another encrusting spring in the same department, situated at Chaluzet, near Pont Gibaud, rises in a gneiss country, at the foot of a regular volcanic cone, at least twenty miles from any calcareous rock. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology The peak of the Bouchard, a, is of gneiss, and its beds run down in lines originally straight, but more or less hollowed by weathering, to the point h, where they plunge under d�bris. Modern Painters, Volume IV (of V) The gneiss at Knock is exceedingly various in its composition, and many of its strata the geologist would fail to recognize as gneiss at all. The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland The term granite, as used commercially, includes true granite and such allied rocks as syenite and gneiss. The Economic Aspect of Geology In their flight, they had not thought of looking either toward the crevasse or the gneiss rock.—Other large boulders intervened, and they had not observed whether it was gone. The Plant Hunters Adventures Among the Himalaya Mountains Progressively southward they score deeper into the strata of the earth's crust until, as they approach their climax, they break through the bottom of the Paleozoic limestone deep into the heart of the Archean gneiss. The Book of the National Parks But Turner had to add to such general complexity the expression of a more than ordinary undulation in the beds of the St. Gothard gneiss. Modern Painters, Volume IV (of V) Such are a few of the rocks included in the general gneiss deposit of Sleat. The Cruise of the Betsey or, A Summer Ramble Among the Fossiliferous Deposits of the Hebrides. With Rambles of a Geologist or, Ten Thousand Miles Over the Fossiliferous Deposits of Scotland In North Carolina and Georgia, the corundum occurs in vein-like bodies at the contact of peridotite with gneisses and schists, and also in part in the peridotite itself. The Economic Aspect of Geology Hitherto the rock had been primitive limestone lying on gneiss, but we now came upon a thick stratum of pure limestone. Journal of a Visit to Constantinople and Some of the Greek Islands in the Spring and Summer of 1833 Autunite is usually found with pitchblende and other uranium minerals, or with ores of silver, tin and iron; it sometimes coats joint-planes in gneiss and pegmatite. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" Looking closely at them, I noticed an exact resemblance between these rocks and the little bits of gneiss which we had found in the stomach of a penguin we had killed the day before. Celebrated Travels and Travellers Part III. The Great Explorers of the Nineteenth Century We stood in a snow-pit amongst the hills, and above us rose in grandeur the great pyramids of basalt and gneiss. The Iron Pirate A Plain Tale of Strange Happenings on the Sea Garnets result mainly from contact metamorphism, and commonly occur either in schists and gneisses or in marble. The Economic Aspect of Geology They incurred daily risks in landing and in blasting the splintery gneiss, and in the falling of heavy bodies in the narrow space to which they were confined. Illustrated Science for Boys and Girls The rocks consist of granite, sienite, gneiss, &c.; and, as is always the case where such rocks are found, the country is hilly and rugged. Popular Adventure Tales These are the rough primitive formations of the human race—the bare granite and gneiss, from which sprouts no luxuriant foliage, but at best a few simple and hardy flowers. Northern Travel Summer and Winter Pictures of Sweden, Denmark and Lapland The gneiss rocks of the first division occupy about a fifth of the surface of the soil, extending longitudinally from north to south. The International Monthly, Volume 3, No. 1, April, 1851 More sediments are formed than are changed to schists and gneisses, and more schists and gneisses are formed than are changed back to igneous rocks. The Economic Aspect of Geology In those days Agassiz was living under a slab of gneiss on the glacier of the Aar. Fragments of science, V. 1-2 All these minerals have once been imbedded in the granitic gneiss, which is the principal rock of the region. The Voyage of the Vega round Asia and Europe, Volume I and Volume II In other places, we had but the rough hills, or rather knobs of gray gneiss, whose masses were covered with yellow moss, and the straggling fir forests. Northern Travel Summer and Winter Pictures of Sweden, Denmark and Lapland The great central masses, however, consist generally of crystalline granite, gneiss, and quartz rock, protruding from the bowels of the earth and shoving up the stratified envelope of rocks nearly 6 miles above sea-level.... Birds of the Indian Hills It is present in some sediments and likewise occurs in many schists and gneisses. The Economic Aspect of Geology That adamantine mixture of gneiss and quartz, prepared in nature's laboratory throughout millions of years, was now furnishing the rock which, beneath human manipulation, was flowering into the great cathedral! Flamsted quarries But first on the neighbouring high land, where the weathered gneiss strata yielded a more fertile soil than the sterile sand thrown up out of the sea, did the vegetation assume a more variegated stamp. The Voyage of the Vega round Asia and Europe, Volume I and Volume II It occurs in somewhat long, hexagonal prisms, with smooth, truncated planes, and is often found in granite and the silt brought down by rivers from granite, gneiss, and similar rocks. The Chemistry, Properties and Tests of Precious Stones The rocks consist of granite, sienite, gneiss, etcetera; and, as is always the case where such rocks are found, the country is hilly and rugged. The Young Voyageurs Boy Hunters in the North Ceylon graphite occurs in veins and lenses cutting gneisses and limestones. The Economic Aspect of Geology Prawle Point is very striking, and is 'principally composed of gneiss rock, which on the western side is weathered like a surface of snow which has been exposed to the sun's rays. Devon, Its Moorlands, Streams and Coasts The bare and utterly desolate island consisted of a low gneiss rock, rising here and there into cliffs, which were shattered by the frost and rather richly clothed with lichens. The Voyage of the Vega round Asia and Europe, Volume I and Volume II At last he ventured to ask whether there were any fossils in the blocks of gneiss that were scattered over the moorland. Lippincott's Magazine of Popular Literature and Science Volume 11, No. 24, March, 1873 In Africa even the grey granite or gneiss has a deeper tone than these limestones, and it is frequently covered by red and yellow lichens of wonderful beauty. Impressions of South Africa In Georgia the asbestos, which is anthophyllite, occurs in lenticular masses in peridotite associated with gneiss. The Economic Aspect of Geology For thirteen years they had gone down, and the barns and fences yet lay as Sherman left them, as unchanged as the gneiss rocks about them. Lippincott's Magazine, Vol. 22, September, 1878 The rocks round Taimur Sound consist of gneiss strata, which form low ridges that have been so shattered by the frost that they have been converted into immense lichen-clad stone mounds. The Voyage of the Vega round Asia and Europe, Volume I and Volume II There was also a good deal of greenstone and gneiss, and some of the spires of these that shot up to a considerable height were particularly striking and picturesque objects. The World of Ice “Granite—quartz—gneiss—quartz,” he said in a low voice, as he carefully examined each fresh fracture in the stone. Menhardoc Yellowish-brown crystals of monazite have been found scattered through granites, gneisses, and pegmatites, but in quantities ordinarily too small to warrant mining. The Economic Aspect of Geology It may then interest you to know that the crest of the Alleghany Mountains, composed of granite, gneiss, and slates, is the watershed between the Atlantic and the Mississippi. From Pole to Pole A Book for Young People Similar crystals of relatively large size are found attached to gneiss at several places in the Swiss and Tirolese Alps. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" The whole basin between the Orinoco and the Amazon is composed of granite and gneiss, slightly covered with débris. The Andes and the Amazon Across the Continent of South America But the borders of Lower Carp Lake, where the gneiss formation prevails, are composed of hills, having less altitude, fewer precipices, and more rounded summits. Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1 The North and South Carolina monazite has been obtained chiefly from stream beds, and to a slight extent by mining and washing the rotted underlying rock, which is a pegmatized gneiss. The Economic Aspect of Geology The rock on the Manhattan side was Hudson schist, while that in the reef was Fordham gneiss. Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Tunnels. Paper No. 1159 Talcose flakes are frequent, and in some places it seems to be clearly gneiss. To The Gold Coast for Gold, Vol. II A Personal Narrative Initial g before n is silent—gnaw. gnat gnarl gnu gnaw gneiss gnome Rule 10. How to Teach Phonics This island is merely a rock of gneiss, that rises forty or fifty feet above the lake, and is precipitous on the north side. Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1 In Madagascar the graphite is mainly disseminated in a graphitic schist, though to some extent it is present in the form of veins and in gneiss. The Economic Aspect of Geology Here, as elsewhere, they resembled each other closely; the gneiss was slightly the harder, but both were badly seamed and fissured. Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. The East River Tunnels. Paper No. 1159 In places the gneiss has been so little changed by heat and pressure that it forms arenaceous flags and shales. To The Gold Coast for Gold, Vol. II A Personal Narrative In the centre of a lovely valley rises a conical rock of gneiss, protruding to the height of 200 feet or more. Round About the Carpathians The hills are composed of gneiss, but their acclivities are covered with a coarse gravelly soil. Narrative of a Journey to the Shores of the Polar Sea, in the Years 1819-20-21-22, Volume 1 Talc deposits consist of lenses and bands in metamorphic limestones, schists, and gneisses of ancient age. The Economic Aspect of Geology The rock is gneiss, of a kind that is not easily disintegrated or eroded, nor is there any evidence of any convulsive movement. The Hudson Three Centuries of History, Romance and Invention The gold is sometimes visible in the gneiss; and I have seen pieces whose surface is dotted with yellow spots resembling pyrites. To The Gold Coast for Gold, Vol. II A Personal Narrative The rocks known as gneiss and schist are readily bored and are considered fair water bearers. If You're Going to Live in the Country The whole northern half of the lake is bordered by gneiss or mica slate, with tertiary deposit where torrents enter it. The Poetry of Architecture Or, the Architecture of the Nations of Europe Considered in its Association with Natural Scenery and National Character The hills, however, are all composed of quartz, gneiss, talcose slate, or mica slate. The Bay State Monthly, Volume 3, No. 2 The natural outcroppings of the gneiss appeared on the surface about 16th Street, on the east side of the city, and run diagonally across to 31st Street on 10th Avenue. The Hudson Three Centuries of History, Romance and Invention The gold matrix is still the Tákwá gneiss, rarely showing visible metal. To The Gold Coast for Gold, Vol. II A Personal Narrative The Laurentian rocks, consisting of highly crystalline gneiss, granite and syenite, are almost impervious, while the overlying Potsdam sandstone is very porous, and capable of holding large quantities of water. Saratoga and How to See It The aspect of the rock at this stage is that of a gneiss with rather indefinite banding. History and Comprehensive Description of Loudoun County, Virginia Geology.—The rock encountered may be classed as "gneiss"; its character varied from granite to mica schist. Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad The Terminal Station - West The rock of New York Island is gneiss, except a portion of the north end, which is limestone. The Hudson Three Centuries of History, Romance and Invention Being cut in the gneiss, they require no timbering; but the floors are little raised above the level of the rivulet, and water percolates through roofs and walls. To The Gold Coast for Gold, Vol. II A Personal Narrative The country around was wild and rugged—still the same primitive formation, gneiss being the most common rock. Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 1 Under the Orders and at the Expense of Her Majesty's Government It produced effects varying from granite with a rude gneissoid appearance, through a banded fine gneiss, into a fine quartz schist or slate. History and Comprehensive Description of Loudoun County, Virginia The strike of large masses of foliated gneiss is parallel with the major axis of the Lake, and all are tilted on edge. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 It is a truly eruptive rock, occurring in intrusive bosses, or in beds interstratified with gneiss and mica-schist, and owes its various shades of green to the presence of copper. Roman Mosaics Or, Studies in Rome and Its Neighbourhood The formation is upper Silurian or lower Devonian, a transition to gneiss, but not highly metamorphic. To The Gold Coast for Gold, Vol. II A Personal Narrative In the eastern portion of Princeton the underlying rock is a kind of micaceous schist, and in the western is granitic gneiss. The Bay State Monthly — Volume 2, No. 1, October, 1884 The gneiss from the quartz it contains makes a sandy soil, while the clay slate gives it tenacity. History and Comprehensive Description of Loudoun County, Virginia We still ascend in altitude as we go westwards, and come upon long tracts of gneiss with hornblende. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 On this remarkable stone, which is about seven feet square, composed of a hard gneiss, and quite undressed by the chisel, are sculptured two feet, right and left, about ten inches long each. Roman Mosaics Or, Studies in Rome and Its Neighbourhood They were probably mud and sand and limestone when first made, but they have been changed to mica schists, gneiss, granite, marble, and other crystalline rocks. Young Folks' Library, Volume XI (of 20) Wonders of Earth, Sea and Sky The three principal elevations in Princeton are mainly composed of gneiss. The Bay State Monthly — Volume 2, No. 1, October, 1884 However, much of the rock of the valley partakes of the nature of both hornblend and gneiss, and has been aptly termed a "hornblend gneiss rock." History and Comprehensive Description of Loudoun County, Virginia Mica schist crowned some of the heights on the watershed, then gneiss, and now, as we descend further, we have igneous rocks of more recent eruption, porphyry and gneiss, with hornblende. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Underneath this canopy, in the centre of a huge mass of gneiss and hornblende, forming the living rock, there is the rude outline of a gigantic foot about five feet long, and of proportionate breadth. Roman Mosaics Or, Studies in Rome and Its Neighbourhood The summit of the Jungfrau, for example, consists of gneiss granite, but two masses of Jura limestone have been thrust into it, and their ends folded over. Among the Forces This variety of rock is identical with granite in its composition, the distinctive point between the two being that gneiss has lines of stratification while granite has none. The Bay State Monthly — Volume 2, No. 1, October, 1884 The stones used are chiefly granite and gneiss. Rough Stone Monuments and Their Builders The gneiss is often striated, all the striae looking one way—sometimes north and south, and at other times east and west. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 The long ridges of quartz traversing the gneiss are marked features in the scenery of Bundēlkhand. Rambles and Recollections of an Indian Official This soil, which is highly argillaceous, and strongly tinged with tritoxyde of iron, is formed by the decomposition of gneiss or granite rocks. The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. The rock of which Wachusett is mainly composed has rather obscure stratification, and hence may be called granitic gneiss. The Bay State Monthly — Volume 2, No. 1, October, 1884 It is composed of granite resting on an elevated plateau of soft friable gneiss. Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries We passed many masses of ferruginous conglomerate, and I noticed that most of the gneiss dips westwards. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Primitive rock consists of granite, porphyry, gneiss and basalt, deposits which are still found upon the earth in immense quantities, and in the same condition as thousands of years ago. Valere Aude Dare to Be Healthy, Or, The Light of Physical Regeneration Huge masses of granite and gneiss are scattered everywhere in savage confusion, and the road barely twines a painful way through the labyrinth. A Midsummer Drive Through the Pyrenees The gneiss of this region is not especially rich in other mineral contents. The Bay State Monthly — Volume 2, No. 1, October, 1884 These minerals constitute the main constituents of granite, gneiss, and mica schist, of basalt, dolerite, and many porphyries. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Grey granite or quartz with talc in it or gneiss lie under the haematite. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 This rock consisted of granite, porphyry, gneiss and basalt, and these are still found upon the earth in immense quantities in practically the same condition they were thousands of years ago. Valere Aude Dare to Be Healthy, Or, The Light of Physical Regeneration The so-called "primitive gneiss" of Norway appears to belong to the Laurentian, and the Page 67 ancient metamorphic rocks of Bohemia and Bavaria may be regarded as being approximately of the same age. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science Granite, seinite, and gneiss take the first, place for strength, hardness and durability, but they will not stand a high temperature. Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 Strate of transition argillaceous schist in the Fichtelgebirge, which can be traced for a length of 16 miles, are transformed into gneiss only at the two extremities, where they come in contact with granite. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 "A splendid specimen of gneiss," explained the professor triumphantly, "and now, Mr.—er—you were saying?" The Boy Inventors' Radio Telephone At Piagalla, on the road between Galle and Colombo, within about four miles of Caltura, there is a gneiss hill of this description on which a temple has been so erected. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 But the borders of Lower Carp Lake where the gneiss formation prevails are composed of hills having less altitude, fewer precipices, and more rounded summits. The Journey to the Polar Sea The part of Southampton Island on which we landed is about a thousand feet high, and composed of gneiss. Three Voyages for the Discovery of a Northwest Passage from the Atlantic to the Pacific, and Narrative of an Attempt to Reach the North Pole, Volume 1 On what did these so-called 'most ancient' formations rest, if gneiss and mica schist must be regarded as changed sedimentary strata? COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 Still, somewhere in that upper world of lilac-white that melts into the clouds in vast but distance-softened chasms of viscid ice and rifts of gray gneiss, there is an object for him. Lippincott's Magazine of Popular Literature and Science Volume 15, No. 85, January, 1875 Garnets of inferior quality are common in the gneiss, but finer ones are found in the hornblende rocks. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 This island is merely a rock of gneiss that rises forty or fifty feet above the lake and is precipitous on the north side. The Journey to the Polar Sea It will by that time be effectively supplemented by thirty-five surrounding acres of out-door horticulture, to which the soil of decomposed gneiss is well suited. Lippincott's Magazine of Popular Literature and Science Volume 17, No. 100, April, 1876 The travelers sat down on a low block of gneiss to rest themselves, and then and there did the King of Borva recite his grievances and rage against the English smacks. Lippincott's Magazine of Popular Literature and Science Volume 11, No. 25, April, 1873 The contortions of gneiss were similarly analogous, it was suggested, to those of the various forms of silica. The Life of John Ruskin Hence at the abrupt terminations of some of the chains in the district of Saffragam, plutonic rocks are seen mingled with the dislocated gneiss. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 The hills are composed of gneiss but their acclivities are covered with a coarse gravelly soil. The Journey to the Polar Sea Beyond it we traversed a plain five miles in extent, and backed by low grassy hills composed of grey gneiss. Three Expeditions into the Interior of Eastern Australia, Volume 2 The north shore consists of Laurentian gneiss with a sparse wood growth; the south bank for the most part is low, the formation being a cretaceous sandstone. The New North It occurs in alluvial soil, in the vicinity of rocks belonging to the secondary or floetz-trap formation, and imbedded in gneiss. The Mirror of Literature, Amusement, and Instruction Volume 20, No. 560, August 4, 1832 Gneiss.—The great geological feature of the island is, however, the profusion of gneiss, and the various new forms arising from its disintegration. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 There was also a good deal of green-stone and gneiss, and some of the spires of these that shot up to a considerable height were particularly striking and picturesque objects. The World of Ice The rocks in the bed of this stream consisted of grey gneiss, and on the hills beyond it I found nodules of highly ferruginous sandstone. Three Expeditions into the Interior of Eastern Australia, Volume 2 He looked at it and said it was gneiss. Stories by American Authors, Volume 1 When the calcareous region of the Gévaudan is reached, the schist, slate, and gneiss disappear. Wanderings by southern waters, eastern Aquitaine The oxide of iron thus produced communicates its colouring to the laterite, and in proportion as felspar and hornblende abound in the gneiss, the cabook assumes respectively a white or yellow hue. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 The feldspars are essential constituents of nearly all crystalline rocks, as granite, gneiss, mica, slate, most kinds of basalt and trachyte, etc. The Gutenberg Webster's Unabridged Dictionary Section F, G and H I found decomposed gneiss at the base of this hill. Three Expeditions into the Interior of Eastern Australia, Volume 2 And then, O Squib, he set out to explain that he meant "gneiss," not "nice!" Stories by American Authors, Volume 1 So narrow was the gorge at length that the road ran along a ledge that had been cut in the gneiss. Wanderings by southern waters, eastern Aquitaine Amethysts are found in the gneiss, and some discoloured though beautiful specimens in syenite; they are too common to be highly esteemed. Ceylon; an Account of the Island Physical, Historical, and Topographical with Notices of Its Natural History, Antiquities and Productions, Volume 1 The prevailing types are granites, gneisses and schists. The Project Gutenberg Encyclopedia Volume 1 of 28 Nearer the coast a friable whitish sandstone affords but a poor soil, except where the partial occurrence of decomposed laminated felspar and gneiss produced one somewhat better. Three Expeditions into the Interior of Eastern Australia, Volume 2 They stood on a ridge of broken quartz and gneiss, thrown up in a bygone age. The Spenders A Tale of the Third Generation A stream came tumbling down a deep ravine over blocks of gneiss to join the Lot, and a little beyond this was a hamlet. Wanderings by southern waters, eastern Aquitaine The underlying rock is gneiss, and the country from the Nascaupee River is thickly strewn with huge glacial bowlders. The Long Labrador Trail The rock, being gneiss, was extremely tough, and the preliminary quarrying operations for the foundation stones which had to be sunk into the rock were tedious and difficult, especially as the working area was limited. Seeing Europe with Famous Authors, Volume 2 Great Britain and Ireland, Part 2 The lowest range above Djidda is calcareous; but its rocks soon change into gneiss, and a species of granite, with schorl in the place of feldspath, accompanied by predominant masses of quartz, and some mica. Travels in Arabia; comprehending an account of those territories in Hedjaz which the Mohammedans regard as sacred The Great Slave Lake is dotted with little islands, the granite and gneiss of which they are formed jutting up in several places. The Fur Country Seventy Degrees North Latitude The range is composed of gneiss rock and quartz. Explorations in Australia The Journals of John McDouall Stuart Of the rocks observed, by far the greater number are foliated basic eruptives,—schists and gneisses. The Long Labrador Trail The rock on the side of the road is mostly composed of gneiss. Travels in Syria and the Holy Land The black gneiss below, the variegated quartzite, and the green or alcove sandstone form the foundation for the mighty red wall. Canyons of the Colorado And, needing no other invitation, he set his strength against the massive block of gneiss. Darkness and Dawn There is the same smiling alternation of woodland and meadow, the same huge boulders of gneiss and granite which give a distinctive tone to the landscape, the same exuberance of living waters. Old Calabria Beds of granular limestone are most common in the primitive northern chain; and it is somewhat remarkable that they are found in gneiss, and not in mica-slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Free gold in paillettes was noticed by the Expedition in the micaceous schists veining the quartz, and in the chalcedony which parts the granite from the gneiss. The Land of Midian — Volume 2 Then over the black gneiss are found 800 feet of quartzites, usually in very thin beds of many colors, but exceedingly hard, and ringing under the hammer like phonolite. Canyons of the Colorado It is formed of gneiss, which, especially in the superior strata, passes into mica-slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rock is gneiss, weathered so much that it cannot be recognized; and at a thousand paces on the other side is a similar one, clearly crystalline. The Former Philippines thru Foreign Eyes I noticed on the north-west extremity of the basin of the West Indies that the secondary formations dip towards south-east; along the coast of Venezuela rocks of gneiss and primitive mica-slate dip to north-west. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Mecca is barren and treeless; its sandy stretches only broken here and there by low hills of quartz or gneiss, scrub-covered and dusty. Mahomet Founder of Islam Let this formation be called the black gneiss. Canyons of the Colorado At a hundred toises distance from the auriferous quartz, the gneiss resumes its ordinary situation, hor 3 to 4, with 60 degrees dip to the north-west. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The mountain consists of gneiss much decomposed, with quartz veins in the stream-work, with the exception of the bands of quartz, which are of almost pure clay earth with sand. The Former Philippines thru Foreign Eyes The gneiss of the littoral Cordillera, in the province of Caracas, contains almost exclusively garnets, rutile titanite and graphite, disseminated in the whole mass of the rock, shelves of granular limestone, and some metalliferous veins. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 This is covered by a thick mass of porphyry, containing large fragments of slate, gneiss and granite in its lower part, and in its upper portion it has a fine grain and light colour. Journals of Australian Explorations At the summit of the black gneiss a terrace is found, and, set back of this terrace, walls of elaborate sculpture appear, 800 feet in height. Canyons of the Colorado A few strata of gneiss abound in silvery mica, and contain, instead of garnets, an immense quantity of small octohedrons of pyrites. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Ten minutes north of the village of Malaguit is a mountain in which lead-glance and red lead have been obtained; the rock consisting of micaceous gneiss much decomposed. The Former Philippines thru Foreign Eyes The former issue from a granite with large grains, very regularly stratified; the latter from a rock of gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 At the camp gneiss, porphyry, and trap have superseded the slates, and proceeding east, granite is visible at the western base of the range. Journals of Australian Explorations These continue for about 70 miles, when the black gneiss below is lost, for the walls are dropped down by the West Kaibab Fault, and the river flows in the quartzites. Canyons of the Colorado Wherever the waters evaporate in the air, they form sediments and incrustations of carbonate of lime; possibly they traverse strata of primitive limestone, so common in the mica-slate and gneiss of the coasts of Caracas. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 To be compelled to soak the Family Bible would surely melt the heart of gneiss! Love, Life & Work Being a Book of Opinions Reasonably Good-Natured Concerning How to Attain the Highest Happiness for One's Self with the Least Possible Harm to Others On a very near examination of these rocks we saw the strata of gneiss inclined towards the north-west and crossed by thick layers of quartz. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 At 9.40 the granite and gneiss formed a basis of the high sandstone-topped hills, which rose about 500 feet on each side of the valley. Journals of Australian Explorations The next 80 miles of the canyon is a compound of that found where the river is in the black gneiss and that found where the dead volcanoes stand on the brink of the wall. Canyons of the Colorado The gneiss appeared uncovered, presenting the same direction of strata, and the same dip towards the north-west. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 But just as a silicious deposit may be metamorphosed into opal or quartzite, and chalk into marble, so known metamorphic agencies may metamorphose clay into schist, clay-slate, slate, gneiss, or even granite. Discourses Biological and Geological Essays The hills of gneiss were covered with grasses. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 At 4.40 bivouacked on a large gully trending northwards, with several small pools of water in a rocky bed of gneiss, containing numerous small garnets. Journals of Australian Explorations So, for a dozen miles of river through the gneiss, there may be a hundred miles of wall on either side. Canyons of the Colorado The gold is contained in pyrites, which are found sometimes disseminated almost imperceptibly in the whole mass of the gneiss,* and sometimes united in small veins of quartz. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The subjacent rocks, also, of gneiss, mica slate, and quartz, are everywhere grooved and polished as if by the passage of a glacier.* The Antiquity of Man The term contemporary formation is here taken in the sense attached to it by geologists, in speaking of beds of quartz in clay-slate, granular limestone in mica-slate or feldspar in gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 It appears that this metal was not collected in veins of quartz, but was found disseminated in the rock, as it is sometimes in granite and gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Great, bare, rounded masses of hard quartzite protruded through the scanty soil, and in the river were enormous boulders of granite-like gneiss. The Naturalist in Nicaragua The zone of gneiss just mentioned is, in the coast-chain from the sea to the Villa de Cura, ten leagues broad. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rock was found by Watson to be gneiss, rich in mica, felspar and garnets. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Don Francisco Ramirez, a traveller versed in chemical and mineralogical science, informed me that the western part of the island is granitic, and that he there observed gneiss and primitive slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 The mountains of mica-slate and gneiss in Peru and New Grenada immediately touch the volcanic porphyries of the provinces of Quito and Pasto. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Most of them were of the Depilto quartz rock and gneiss, and I saw many in the unstratified gravel near Ocotal fully eight miles from their parent rock. The Naturalist in Nicaragua We there find, what is so rare in that country, a garden, artificial clumps of trees, and on the border of the water, upon a rock of gneiss, a pavilion with a mirador, or belvidere. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rock was a gneiss which varied in character from that which had been examined at Cape Denison and in other localities. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 The primitive rocks are chiefly represented by granite and gneiss. School History of North Carolina : from 1584 to the present time With respect to the fragments of granite, gneiss, and mica-slate, found on the shores of Santa Cruz and Orotava, they were probably brought in ships as ballast. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 He found true erratics—loose pebbles, granite, gneiss, and granitic sandstone, having no resemblance to any native rock in the vicinity—scattered over the whole surface of the hill to its very summit. Louis Agassiz: His Life and Correspondence According to angles taken in the valleys of Aragua, the gneiss appears to descend below the granite, which must consequently be of a more recent formation. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 To it we diverged and found it to be gneiss similar to that of Aurora Peak. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Through stubborn granite wall, tough porphyry, ringing quartz, and bedded gnarled gneiss, men will grope for the feathery, fairy veins of the yellow metal. The Little Lady of Lagunitas A Franco-Californian Romance The gneiss as far as this spot preserves its lamellar texture and its primitive direction; but where we climbed the summit of the Silla, we found it had passed into granite. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The materials are gneiss and schist, banded with quartz—Tuckey's great masses of slate. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 I have found parts of it porous, almost cellular, and split in the form of cauliflowers, fixed on gneiss perfectly compact. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rock was a highly quartzose gneiss, with black bands of schist running through it. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Where the rock is homogeneous, as it is in the inner chasm of the dark gneiss, the widening process seems to have gone on much more slowly. Time and Change In these eastern mountains of Venezuela, the gneiss passes into the state of talc. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Viewed from below, the base rests upon cliffs of gneiss, with debris and quartz in masses, bands and pebbles, pure and impure, white and rusty. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 It is a rock of gneiss, with two summits in the form of a saddle, and raised two hundred feet above the surface of the water. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 It was found to be half a mile long, four hundred feet high and four hundred and fifty feet in width, and, like most of the rock we had seen, mainly gneiss. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 During the journey we found granite changing into gneiss, diorite, and quartz rock. Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845 This rounded summit, and the ridge of Galipano crenated like a wall, are the only objects which in this basin of gneiss and mica-slate impress a peculiar character on the landscape. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 At other times it hardly measures the thickness of paper, coating the gneiss slabs like plumbago. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 The neighbouring hills, called Los Morros de Valencia, are composed of white tufa, a very recent limestone formation, immediately covering the gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 In this particular part the crystalline structure of the ice resembled that of a gneiss, showing that it had flowed under pressure. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 The hills were composed of a lamellar granite, approaching the stratified appearance of gneiss, but the leaflets of mica, instead of forming continuous layers, were scattered. Journal of an Overland Expedition in Australia : from Moreton Bay to Port Essington, a distance of upwards of 3000 miles, during the years 1844-1845 In hollowing the new road out of the rock, two large veins of gneiss were discovered in the mica-slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 We could only disembark upon the clean sand, surrounded by cool shade and blocks of gneiss, the favourite halting-place, as the husks of ground-nuts show. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 The waters of the lake* decompose the gneiss by erosion in a very extraordinary manner. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 At the Bluff the rock was almost all gneiss, very much worn by the action of ice. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 The ranges on either side of the glen were generally varieties of gneiss and granite, in many of which feldspar predominated, coarse ferruginous sandstone, and a siliceous rock with mammillary hematite and hornblende. Expedition into Central Australia The rising of the gneiss and mica-slate strata to the south appears to me to explain in a considerable degree the extreme humidity of the coast. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Tuckey's mica slate appears to be mostly schist or gneiss: I saw only one piece of true slate which had been brought from the upper bed. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 I could not follow the line of junction of the gneiss and granitic formations. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rocks at the summit were granites, gneisses and schists. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 If there were a little more mica in it," he said, "it would be the characteristic gneiss of ice-borne boulders, hereabouts. An African Millionaire Episodes in the Life of the Illustrious Colonel Clay Short grass covered the rocks of gneiss, and it was equally impossible to hold by the grass, or to form steps as we might have done in softer ground. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The steep ascent of dry, clayey soil was strewed with schist and resplendent silvery gneiss; quartz appeared in every variety, crystallized and amorphous, transparent white, opaque, dusky, and rusty. Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2 In the islands that rise like bastions in the midst of the waters, and wherever the rocky bottom of the lake is visible, I recognised a uniform direction in the strata of gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Watson examined them, finding gneiss and granite principally, one type being an exceptionally coarse granite, very much weathered. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Our borings show up all right—most of it is tough gneiss—but if we strike gravel or shale again it means more timbering, of course. Peter: a novel of which he is not the hero This road is cut out of a talcose gneiss* in a state of decomposition. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 It is, therefore, tolerably certain that the underlying older formation of gneisses, crystalline schists and granites, etc., is of Arch�an age, and belongs to the foundation rocks. The South Pole; an account of the Norwegian Antarctic expedition in the "Fram," 1910-12 — Volume 1 and Volume 2 These places correspond no doubt to holes or fissures on the gneiss; and indeed when the bubbles rise from one of the apertures, the emission of gas follows instantly from the other three. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 The rocks appeared all to be gneisses and schists. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 The Lower and the Upper Huronian consist in the main of old sea muds and sands and limy oozes now changed to gneisses, schists, marbles, quartzites, slates, and other metamorphic rocks. The Elements of Geology Travellers are accustomed to halt near a fine spring, known by the name of Fuente de Sanchorquiz, which flows down from the Sierra on sloping strata of gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 These anomalous appearances may partly be explained by supposing great solid wedges of intrusive gneiss to have been forced in laterally between strata to which I found them to be in many sections unconformable. The Student's Elements of Geology To the eastward is seen a small chain of mountains called the chain of Cumadaminari, consisting of gneiss, and not of stratified granite. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Unfortunately, no such thing as earth or gravel existed in which to sink these posts, and the rock being of the variety known as gneiss, was more than ordinarily tough. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 In the Black Hills the irruption of an immense mass of granite has caused or accompanied the upheaval of pre-Cambrian strata and metamorphosed them by heat and pressure into gneisses, schists, quartzites, and slates. The Elements of Geology The gneiss of the valley of Caracas is characterized by the red and green garnets it contains; they however disappear when the rock passes into mica-slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The first of these, gneiss, may be called stratified— or by those who object to that term, foliated— granite, being formed of the same materials as granite, namely, feldspar, quartz, and mica. The Student's Elements of Geology I believe this splendour, commonly reddish but sometimes silvery, to be a reflection produced by large plates of talc, or by gneiss passing into mica-slate. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Hannam operated the forge, and picks and drills were sent along for pointing; an outcrop of gneiss serving as an anvil. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 In many parts of the country they are the source of supply of granite, gneiss, marble, slate, and other such building materials. The Elements of Geology On the south side of the mountain of Avila, the gneiss presents several geognostical phenomena worthy of the attention of travellers. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 EURITE, which has already been mentioned as a Plutonic rock, occurs also with precisely the same composition in beds subordinate to gneiss or mica-slate. The Student's Elements of Geology These rocks are of granite passing into gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Apart from the moraines, the rock exposed in situ was mainly a uniform type of gneiss, crumpled and folded, showing all the signs of great antiquity—pre-Cambrian, in the geological phrase. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 The gneisses appear to be due in many cases to the crushing and shearing of deep-seated igneous rocks, such as granite and gabbro. The Elements of Geology During our journey to the Silla, and in all our excursions in the valley of Caracas, we were very attentive to the lodes and indications of ore which we found in the strata of gneiss. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Both of these alternate with gneiss or mica-schist, or pass into those rocks by the addition of mica, or of feldspar and mica. The Student's Elements of Geology I could have fancied myself transported to the north of Europe, to the ridge of the mountains of gneiss and granite between Freiberg and Marienberg in Saxony. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Relieving the grey sheen of the gneiss were dark bands of schist which tracked about in an irregular manner. The Home of the Blizzard Being the Story of the Australasian Antarctic Expedition, 1911-1914 Moreover, in the neighbourhood of an extinct volcano, through gneiss, it has been observed that the increase of a degree is only attained at every 125 feet. A Journey to the Interior of the Earth They are neither in the gneiss, which serves as a cement to the balls, nor in the mica-slate, which the veins traverse. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Below this, and in place of the shales, are talc-schists, jasper, and hornstone; and at the bottom, instead of the siliceous and argillaceous sandstones, are quartzite and gneiss. The Student's Elements of Geology In this great extent of land, gneiss and mica-slate are found exclusively, and they constitute one formation.* Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Examples of the third class are gneiss, slate, schist, and marble. An Introduction to Chemical Science It is seldom found in the darker coloured rocks, or in limestone country, but it sometimes occurs in gneiss, mica schist, and chlorite schist. Getting Gold: a practical treatise for prospectors, miners and students The granite superposed on the gneiss does not present a regular separation into beds: it is divided by clefts, which often cross one another at right angles. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The oldest stratified rock of Scotland is the hornblendic gneiss of Lewis, in the Hebrides, and that of the north-west coast of Ross-shire, represented at the base of the section given at Figure 82. The Student's Elements of Geology It was extremely difficult to go up the current against a mass of water, precipitated from a bank of gneiss several feet high. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 These precipitous rocks were all primitive, frequently of granite and gneiss, and mixed in many places with red porphyry. The Albert N'Yanza, Great Basin of the Nile This was an extreme difficulty, as the inclination formed an angle of about 60 degrees; and the mountain was hard gneiss that could only have been scarped by expensive blasting. Cyprus, as I Saw It in 1879 Examining the mosses which cover the rocks of gneiss in the valley between the two peaks, I was surprised at finding real pebbles,—rounded fragments of quartz.* Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Christiania, Euritic porphyry at. —, granite veins in Silurian strata of. —, quartz vein in gneiss at. The Student's Elements of Geology The rock of gneiss exhibits circular holes, the largest of which are four feet deep, and eighteen inches wide. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Still more important are the conclusions at which Darwin arrived with respect to the origin of the schists and gneisses which cover so large an area in South America. Geological Observations on South America The country abounded with pieces of gneiss with a very straight cleavage, that suited them admirably for building purposes. Ismailia On the western declivity of the hill of Cabo Blanco, the gneiss is covered with a formation of sandstone, or conglomerate, extremely recent. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 One of them, composed of hornblende, mica, feldspar, and quartz, is of a dark colour, and is seen underlying gneiss. The Student's Elements of Geology It is a granite passing into gneiss, and remarkable for the peculiar distribution of the black mica, which forms little ramified veins. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 On a bare gently inclined surface of the porphyritic gneiss in Botofogo Bay, I observed the appearance represented in Figure 22. Geological Observations on South America It is, therefore, tolerably certain that the underlying older formation of gneisses, crystalline schists and granites, etc., is of Archæan age, and belongs to the foundation rocks. The South Pole; an account of the Norwegian antarctic expedition in the "Fram," 1910-1912 — Volume 2 This sandstone combines angular fragments of gneiss, quartz, and chlorite, magnetical sand, madrepores, and petrified bivalve shells. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The various elements of the gneiss, with the exception of the quartz, are all softened; and new combinations of the acid with lime, iron, and manganese are continually in progress. The Student's Elements of Geology We refer to the vitrified forts, which are strange structures in which stones, such as granite and gneiss, quartzite and basalt, have been subjected to a heat so intense as to produce vitrification. Manners and Monuments of Prehistoric Peoples The porphyritic gneiss, where now exposed to the air, seems to withstand decomposition remarkably well; and I could see no signs of any tendency to the production of argillaceous masses like those here described. Geological Observations on South America There are no circular hand-mills, as among Oriental nations; but the corn is ground upon a simple flat stone, of cithor gneiss or granite, about two feet in length by fourteen inches in width. In the Heart of Africa In the walls which enclose the gardens of Caracas, constructed partly of fragments of gneiss, we find garnets of a very fine red, a little transparent, and very difficult to detach. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Frequently, between the granite and the hornblende-slate above- mentioned, grains of mica and crystalline feldspar appear in the schist, so that rocks resembling gneiss and mica-schist are produced. The Student's Elements of Geology There are no minerals except iron, no limestone except dolomite, no other rocks than quartz and gneiss. The Rifle and the Hound in Ceylon The abrupt hillocks thus composed, as well as the highly inclined folia of the common varieties of gneiss, strike N.N.E. or a little more easterly, and S.S.W. Geological Observations on South America No one can travel there without becoming tiresomely familiar with fine-grained, shattered schists, coarse granites, and their curiously banded relatives, the gneisses. The Red Man's Continent: a chronicle of aboriginal America The weathered surface, also, of the banded variety in Figure 4, strikingly resembles a worn fragment of finely laminated gneiss. Volcanic Islands These Scotch metamorphic strata are of gneiss, mica-schist, and clay-slate of vast thickness, and having a strike from north-east to south-west almost at right angles to that of the older Laurentian gneiss before mentioned. The Student's Elements of Geology Assoc., and he comes to the conclusion that gneiss, etc., may be metamorphosed cleavage or strata; and I think he admits much chemical segregation along the planes of division. More Letters of Charles Darwin — Volume 2 There are, however, several other varieties of gneiss regularly foliated, and alternating with each other in so-called strata. Geological Observations on South America He was near the Casket, that abrupt upheaval of quartz and gneiss, shaped like a coffer, from which the mountain took its name. Openings in the Old Trail These layers are parallel, slightly tortuous, and short; they thin out at their ends, and resemble in form the layers of quartz in gneiss. Volcanic Islands The different varieties of rock allied to gneiss, into which feldspar enters as an essential ingredient, will be understood by referring to what was said of granite. The Student's Elements of Geology "It is gneiss, a sort of sheet-granite; but do not you too admire people who work when they are not compelled to do anything?" Samuel Brohl and Company In this case and at Rat Island, the passage of the gneiss into imperfect hornblendic or into chloritic slate, seemed to be connected with the segregation of the veins of quartz. Geological Observations on South America Immediately below us, to the right, we see the rugged gorge of gneiss in which flows Pipe Creek. The Grand Canyon of Arizona; how to see it Farther on, the path was divided by an altar--a pedestal of black gneiss, capped with a slab of white marble deftly foliated, and on that a brazier of bronze holding a fire. Ben-Hur; a tale of the Christ Hence some of the slate rocks have become "micaceous; others more indurated, and with the characters of mica-slate and gneiss; while others again appear converted into a hard zoned rock strongly impregnated with feldspar." The Student's Elements of Geology There are no circular hand-mills, as among Oriental nations; but the corn is ground upon a simple flat stone, of either gneiss or granite, about two feet in length by fourteen inches in width. The Nile tributaries of Abyssinia, and the sword hunters of the Hamran arabs In those not uncommon instances, where a mass of clay-slate, in approaching granite, gradually passes into gneiss, we clearly see that folia of distinct minerals can originate through the metamorphosis of a homogeneous fissile rock. Geological Observations on South America If possible, go up and down the river, and see where the Inner Gorge—the granite or gneiss—really begins. The Grand Canyon of Arizona; how to see it At Bahia the pegmatite and gneiss in beds had the same direction, as observed by Humboldt, prevailing over Columbia, distant 1300 miles—is it not wonderful? Life and Letters of Charles Darwin — Volume 1 Foliation may be used for those alternating layers or plates of different mineralogical nature of which gneiss and other metamorphic schists are composed. The Student's Elements of Geology It is formed of a semi-circular ridge of gneiss hills, covered with fine short grass. In Search of the Castaways; or the Children of Captain Grant The prevailing rock is gneiss, often passing, by the disappearance of the quartz and mica, and by the feldspar losing its red colour, into a brilliantly grey primitive greenstone. Geological Observations on South America This "granite" is in the main a blackish gneiss. The Grand Canyon of Arizona; how to see it The rocks of Ceylon are primitive, consisting of granite, gneiss and quartz. Eight Years' Wanderings in Ceylon There is in that locality a blue limestone foliated by the intercalation of small plates of white mica, so that the rock is often scarcely distinguishable in aspect from gneiss or mica-schist. The Student's Elements of Geology Mountains of gneiss and slate rose on all sides, like an ampitheatre, hiding their ruddy flanks behind forests of oak, and forming on their declivities other and lesser valleys full of dewy freshness. The Chouans The numerous travellers in this country, have all been greatly surprised at the depth to which the gneiss and other granitic rocks, as well as the talcose slates of the interior, have been decomposed. Geological Observations on South America These beds I conceive, when consolidated, to constitute the gneiss formation. A History of Science — Volume 3 |
| 随便看 |
英语例句辞典收录了117811条英语例句在线翻译词条，基本涵盖了全部常用单词及词组的例句翻译及用法，是英语学习的有利工具。