| 单词 | hornblende |
| 例句 | Diorite is identifiable by it’s Dalmatian-like appearance of black hornblende and biotite and white plagioclase feldspar. An Introduction to Geology 2017-01-01T00:00:00Z He had some very fine teacups of agate and hornblende schist with finely chased silver covers, which I admired very much. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z Outside in the wind the black hornblende sphinx kept watch on those who came and went, mourning for their departed. The Near East Dalmatia, Greece and Constantinople 2012-03-26T02:00:38.077Z A mineral of the hornblende group, of a yellowish gray or clove brown color. Webster's Unabridged Dictionary 2012-03-24T02:00:23.513Z The dark-coloured porphyritic crystals of basalts are known as basaltic hornblende. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z The most common amphibole, hornblende, is usually black; however, they come in a variety of colors depending on their chemical composition. An Introduction to Geology 2017-01-01T00:00:00Z The snowy white feldspar and quartz set off the glittering crystals of hornblende and biotite wonderfully. M lange et Trois: A Trip Across Subduction Zone Madness 2012-03-07T22:15:00.213Z I have before noticed the magnetic property of this rock, which was more or less according to the quantity of hornblende: the beach-stones are different sorts of green-stone. Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle, between the years 1826 and 1836 Volume I. - Proceedings of the First Expedition, 1826-1830 2012-02-24T03:00:32.793Z The biotite is brown; the hornblende brown or greenish brown; the augite usually green. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z The Serpentine rock streaked with hornblende, felspar, slate and green-stone, shows changing colours like a pigeon's breast. Cornwall 2012-01-20T03:00:16.790Z Other minerals, with hornblende being a good example, are longer in one direction, linear like a pencil or a needle, rather than a planar-shaped book. An Introduction to Geology 2017-01-01T00:00:00Z Many accessory minerals such as tourmaline and zircon have been identified also, while augite, hornblende and other volcanic minerals occur in varying proportion as in all the sediments of the open sea. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z F� de Nuevo-Mexico, the Si�rra de San Francisco, west of the Rocky Mountains and Pueblo Zuni, consist of hornblende, oligoclase, and brown mica. 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 In the hand specimen many of the hornblende and biotite dacites are grey or pale brown and yellow rocks with white felspars, and black crystals of biotite and hornblende. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 8 "Cube" to "Daguerre, Louis" 2012-01-31T03:00:17.257Z Mica, iron oxides, apatite, zircon, epidote and hornblende may also be present in small amount. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" 2011-12-26T03:00:11.613Z Linear crystals, such as hornblende, tourmaline, or stretched quartz grains, can be arranged as part of a foliation, a lineation, or foliation/lineation together. An Introduction to Geology 2017-01-01T00:00:00Z Felspar, quartz, hornblende, and mica are the four constituents of granite. Harper's New Monthly Magazine Vol. IV, No. 19, Dec 1851 2011-12-25T03:00:11.297Z The huge blocks of brown ironstone, however, which are found near the summit, in the hollow path by which it is customary to ascend, owe their origin to the decomposition of the hornblende. 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 I visited the interior of the gouffre in 1869, and my wonder at its caverns was increased by observing the hardness of the hornblende out of which they have been hollowed. The Ascent of the Matterhorn 2011-11-19T03:00:23.233Z Green augite and hypersthene form a considerable part of these rocks, they may contain also biotite, hornblende and quartz. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Many of them are rich in hornblende and thus form transitions to amphibolites. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z Augite, aw′jīt, n. one of the Pyroxene group of minerals, closely allied to hornblende, usually of a greenish colour, occurring crystallised in prisms, and forming an essential component of many igneous rocks.—adj. Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) 2011-10-11T02:01:08.990Z 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 Blackish grey, fine grained, gneissose granite, composed of quartz, white felspar, and large quantities of fine grains and flakes of hornblende, passing into black mica. 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 Around the garnets there is often a radial grouping of small grains of pyroxene and hornblende in a clear matrix of felspar: these “centric” structures are frequent in granulites. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z These have very much the same composition as acid igneous rocks such as granite, aplite, hornblende granite, or intermediate rocks such as syenite and quartz diorite. 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 In the Piedmont Plateau and Appalachian Mountains Regions the surface soil is generally sandy, but in considerable areas the subsoil is a red clay derived largely from the decomposition of hornblende. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 7 "Geoponici" to "Germany" 2011-09-26T02:00:25.313Z Syenite, composed of honey-yellow felspar and hornblende, in very large crystals, the felspar passing into red and pink, and the whole rock mass penetrated by veins of the same material, but fine grained. 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 Many granites show pearly scales of white mica; others contain dark green or black hornblende in small prisms. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z "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 Hornblende when primary is often brown, and may surround augite or be perthitically intergrown with it; original green hornblende probably occurs also, though it is more frequently secondary. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z Like the northern granitical tracts, the mica is generally replaced by hornblende. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z Columns, pentagonal or heptagonal, crown the tops of hills, and seem rather a composition of hornblende than of augite and feldspar. The Highlands of Ethiopia 2011-02-25T03:01:07.193Z Exceptions to this sequence are unusual; sometimes the first of the felspars have preceded the hornblende or biotite which may envelop them in ophitic manner. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z In what kinds of rock does hornblende usually occur? Geology 2011-02-20T03:00:12.660Z In the less complete stages of alteration, ophitic structure may persist, and the original augite of the rock may not have been entirely replaced by 689 hornblende. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z The primitive sienites and hornblende rock of the sources of the St. Francis and Grand rivers, support it. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z It forms the focus of several small dales converging from the table-land, and shut in from all breeze by the surrounding steep black cliffs of basalt, passing into hornblende. The Highlands of Ethiopia 2011-02-25T03:01:07.193Z Often they enclose dark crystals of biotite and hornblende, arranged zonally. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Common hornblende occurs crystallised or massive, and is dark green or black, with a vitreous lustre. Geology 2011-02-20T03:00:12.660Z The essential minerals, hornblende and felspar, rarely show crystalline outlines, and this is generally true also of the others. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z At a place called the Narrows, the river rushes between alpine peaks of sienite and black hornblende rock, which lies in huge and confused heaps, plainly indicating ancient volcanic action. Scenes and Andventures in the Semi-Alpine Region of the Ozark Mountains of Missouri and Arkansas 2011-07-10T02:00:18.883Z The true asbestos, however, he says, is a fibrous variety of tremolite or hornblende. Asbestos Its production and use, with some account of the asbestos mines of Canada 2011-02-01T03:00:13.163Z The aplites, pegmatites, graphic granites and muscovite granites are usually richest in silica, while with increase of biotite and hornblende, augite and enstatite the analyses show the presence of more magnesia, iron and lime. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z When the crystals are small, it is often difficult to distinguish hornblende from augite. Geology 2011-02-20T03:00:12.660Z The rocks may be fine grained, so that their constituents are hardly visible to the unaided eye; or may show crystals of hornblende an inch in length. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z The last mentioned is a bright blue variety of hornblende with striking pleochroism. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" 2011-01-19T03:00:19.027Z In general terms it may be said to be a fibrous variety of serpentine, closely allied to the hornblende family of minerals, the Canadian variety of which is called by mineralogists "chrysotile." Asbestos Its production and use, with some account of the asbestos mines of Canada 2011-02-01T03:00:13.163Z The hornblende of granites is usually pale green in section, the augite and enstatite nearly colourless. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Sometimes hornblende, or augite, or mica is present. Geology 2011-02-20T03:00:12.660Z EPIDIORITE, in petrology, a typical member of a family of rocks consisting essentially of hornblende and felspar, often with epidote, garnet, sphene, biotite, or quartz, and having usually a foliated structure. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6 "English Language" to "Epsom Salts" 2011-02-19T03:00:59.807Z It is a silicate of calcium, magnesium, iron, and aluminium, and alters in geological time by slow recrystallization into hornblende, possibly with some loss of calcium. 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 Zircon, apatite and iron oxides are the first; their crystals are small, very perfect and nearly free from enclosures; they are followed by hornblende and biotite; if muscovite is present it succeeds the brown mica. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z They consist essentially of plagioclase felspar, with hornblende or augite, and may contain also biotite, quartz and a limited amount of orthoclase. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" Some granites which contain hornblende instead of feldspar are desirable. The Future of Road-making in America The trap-rock, whose fragments strewed the valley, consists of felspar, deeply coloured by hornblende. Narrative of a Second Expedition to the Shores of the Polar Sea Alderney consists mainly of hornblende granite and granulite, which are covered on the east by two areas of sandstone which may be of Cambrian age. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" In the weathering of granite the quartz suffers little change; the felspar passes into dull cloudy, soft aggregates of kaolin, muscovite and secondary quartz, while chlorite, quartz and calcite replace the biotite, hornblende and augite. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z A variety of trap, composed of hornblende and felspar. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Their essential minerals are those of basalt, viz. olivine, augite and plagioclase felspar, while hornblende, ilmenite, apatite and biotite are their commonest accessory ingredients. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" The biotite is always brown or yellow; the hornblende usually green, but sometimes brown or yellowish brown in those diorites which have affinities to lamprophyres. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" Several patches of granite and granulite fringe the western coast, the largest of these is a hornblende granite round Rocquaine Bay. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7 "Cerargyrite" to "Charing Cross" The other minerals found in the concentrates are pebbles and fragments of pyrope, zircon, cyanite, chrome-diopside, enstatite, a green pyroxene, mica, ilmenite, magnetite, chromite, hornblende, olivine, barytes, calcite and pyrites. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" Volcanic rocks composed of felspar, augite, and hornblende. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Often they are comparatively rich in brown hornblende. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 6 "Dodwell" to "Drama" In many diorites the plagioclase felspar has crystallized before the hornblende, which consequently has less perfect outlines and forms irregular plates which enclose sharply formed individuals of felspar. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" Iron ore comes from the hornblende in granite. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place The surface of the ground, so dull and forbidding at first sight, besides being rich in plants, shines and sparkles with crystals: mica, hornblende, feldspar, quartz, tourmaline. My First Summer in the Sierra The difference in form of the two substances may be explained by the different circumstances under which 450 they have been produced, the form of hornblende being the result of slower cooling. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology These sediments are fine and tenacious; their principal components, in addition to clay, being small grains of quartz, zircon, tourmaline, hornblende, felspar and iron compounds. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" The hornblendites differ from the diorites in containing little felspar, and consist principally of hornblende. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5 "Dinard" to "Dodsworth" Granite is made of quartz, feldspar, and mica, sometimes with added particles of hornblende. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place In the older rocks, basalt has often undergone decomposition into melaphyre; and amongst the metamorphic rocks it has been changed into diorite or hornblende rock; the augite having been converted into hornblende. Volcanoes: Past and Present Generally the paste consists of a matrix of fine clay tempered with finely pulverized sand, in which may be detected grains of quartz, feldspar, hornblende, augite, particles of iron oxide, &c. Ancient art of the province of Chiriqui, Colombia Sixth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1884-1885, Government Printing Office, Washington, 1888, pages 3-188 In addition to the reddish or brownish argillaceous matrix it contains fresh or decomposed crystals of volcanic minerals, such as felspar, augite, hornblende, olivine and pumiceous or palagonitic rocks. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" Where diabases have been crushed or sheared, hornblende readily develops at the expense of pyroxene, sometimes replacing it completely. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" The hornblende rusts away chiefly under the influence of moist air and trickling water. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place From this it arose that syenite was regarded as a variety of granite in which the mica is replaced by hornblende, and this has generally been the British view of the question. Volcanoes: Past and Present I especially marked, however, when last on its summit, a ponderous traveller of a vividly green hornblende, resting on a bed of pale yellow sandstone, fully a thousand feet over the present high-water level. 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 Black hornblende, dark brown in thin sections, and often corroded, is not uncommon, especially in intrusive basalts. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon" In the later stages of alteration the amphibole becomes compact and well crystallized; the rocks consist of green hornblende and plagioclase felspar, and are then generally known as epidiorites or amphibolites. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" If hornblende is the most abundant mineral, the same scaly structure shows in a dark rock called hornblende schist, rich in iron. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place The stone was the best possible form of crystallised granite, fine grained, very compact and durable, grey in colour, with here and there black patches or nodules of hornblende. Prisoners Their Own Warders A Record of the Convict Prison at Singapore in the Straits Settlements Established 1825 Structurally, therefore, these isles are a continuation of Land's End, but the granite has become less consistent and more friable; it is largely broken into felspar, quartz, and mica, with schorl, chlorite, and hornblende. The Cornwall Coast The very best are found in veins traversing clay-slate, hornblende slate, and granite, in a little valley not far from Bogota, the capital of the United States of Colombia. Boy Scouts in the Canal Zone The Plot Against Uncle Sam But transition forms are very common, having more or less of the augite remaining, surrounded by newly formed hornblende which at first is rather fibrous and tends to spread outwards through the surrounding felspar. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" The fine mud which now appears as beds of slate was the decay of feldspar and hornblende in the same granite. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place An examination of the stones which fell at Fort de France showed them to be of a variety of lava called hornblende and andesite. Complete Story of the San Francisco Horror Their number is by no means large, and they all consist of mixtures in variable proportions of quartz, felspar, mica, hornblende, augite, and zeolites. Elements of Agricultural Chemistry The boulders of Erreré are entirely distinct from the rock of the Serra, and consist of masses of compact hornblende. The Atlantic Monthly, Volume 18, No. 106, August, 1866 The minerals of diabase are the same as those of dolerite, viz. olivine, augite, and plagioclase felspar, with subordinate quantities of hornblende, biotite, iron oxides and apatite. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3 "Destructors" to "Diameter" This stone is a volcanic rock called hornblende, of very fine grain, with minute specks of mica. Brittany & Its Byways Many of the latter are magnetite, while the others are hornblende and various ferromagnesian silicates. Aboriginal Remains in Verde Valley, Arizona Thirteenth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1891-92, Government Printing Office, Washington, 1896, pages 179-262 The albite which the former contains undergoes a rapid decomposition, and yields abundance of soda along with some potash, which is seldom altogether wanting, while the hornblende supplies both lime and magnesia. Elements of Agricultural Chemistry On the way down to the river by the sides of the Point Campolaccia, near a place called Campolajo, is beautiful hornblende, page 27. Itinerary through Corsica by its Rail, Carriage & Forest Roads The matrix has the appearance of a gray speckled quartzite; the angular inclusions being whitish feldspar, with dark-greenish patches of hornblende. Illustrated Catalogue of a Portion of the Collections Made During the Field Season of 1881 Third Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1881-82, Government Printing Office, Washington, 1884, pages 427-510 Of hornblende schist; these are elongate and intended to be used with both hands. 12-13. Illustrated Catalogue of the Collections Obtained from the Indians of New Mexico in 1880 Second Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1880-81, Government Printing Office, Washington, 1883, pages 429-466 The rock is of trap, greenstone, or whinstone, which miners call iron-stone and Cornishmen 'blue elvan:' this diorite, composed of felspar and the hardest hornblende, contains granular iron and pyrites like silver. To The Gold Coast for Gold, Vol. II A Personal Narrative The essential constituents are quartz, orthoclase and plagioclase, and by the addition to these of biotite, garnet, epidote, blue quartz, and hornblende, five types are formed. 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 I heard one fellow say once that they thought they'd never find gold in hornblende. The Killer "Hammering and clinking, chattering stony names Of shale and hornblende, rag and trap and tuff, Amygdaloid and trachyte." The Squire of Sandal-Side A Pastoral Romance 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 Another rock that is a valuable acquisition is hornblende. 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 One of these beds of basalt was converted into grey syenite by a large granular mixture of white quartz and feldspar with the black hornblende. Rambles and Recollections of an Indian Official The disturbance is easily accounted for by the hornblende in the granite, or by other iron-bearing rocks. The Art of Travel Shifts and Contrivances Available in Wild Countries The bones were dug up by Mr. Walter Mantell from a bed of marly sand, containing magnetic iron, crystals of hornblende and augite, and the detritus of augitic rocks and earthy volcanic tuff. COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 In the interior of a surrounding of granite there is a great basin of hornblende rock of schistose character, and through this, at an angle of about forty-five degrees, runs the lode. Gold, Sport, and Coffee Planting in Mysore 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 During our day's journey I found grey porphyry, the base consisting apparently of granular felspar with embedded crystals of common felspar and grains of hornblende. Three Expeditions into the Interior of Eastern Australia, Volume 2 On some of the hills the rocks were shivered into irregular pieces, and displayed crystals of quartz, small laminae of mica, and occasionally hornblende. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 2 The prevailing character of the rocks was granitic, out of which some beautiful specimens of hornblende were procured. Discoveries in Australia, Volume 1. With an Account of the Coasts and Rivers Explored and Surveyed During The Voyage of H.M.S. Beagle, in the Years 1837-38-39-40-41-42-43. By Command of the Lords Commissioners of the Admiralty. Also a Narrative Of Captain Owen Stanley's Visits to the Islands in the Arafura Sea. The porphyry, which is of warm brown or chocolate colour, includes many crystals of lighter coloured felspar, and dark crystals of hornblende. Gold, Sport, and Coffee Planting in Mysore 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 It is a variety of hornblende, composed of silica, lime, and magnesia, with a little alumina. Scientific American Supplement, No. 415, December 15, 1883 On the sides of the hills were broken rocks containing mica, hornblende, and crystals of quartz. Narrative of the Voyage of H.M.S. Rattlesnake, Commanded By the Late Captain Owen Stanley, R.N., F.R.S. Etc. During the Years 1846-1850. Including Discoveries and Surveys in New Guinea, the Louisiade Archipelago, Etc. to Which Is Added the Account of Mr. E.B. Kennedy's Expedition for the Exploration of the Cape York Peninsula. By John Macgillivray, F.R.G.S. Naturalist to the Expedition. — Volume 2 The second is a massive mountain ridge of the northern sienite, abounding in black crystaline hornblende, and flanked at lower altitudes, in front, in some places, by a sort of trachyte. Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers Their commonest minerals are olivine, anorthite, hornblende, augite, biotite and leucite. The Project Gutenberg Encyclopedia Volume 1 of 28 Minerals present are hornblende, biotite, plagioclase, pyroxene, quartz and the alteration products from the feldspar. The Long Labrador Trail The granite of the columns is particularly beautiful, the feldspath and quartz being mixed with the hornblende in large masses. Travels in Syria and the Holy Land The house, built like most other old farm-houses in that part of the county, of hornblende stone, stood near the bottom of a rounded knoll, overhanging the deep, winding valley. The Story of Kennett The failure of the attempts made under the intendant, Don Jose Avalo, must be attributed solely to the ignorance of the persons employed by the Spanish government who mistook mica and hornblende for metallic substances. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Most of the broad summit is comparatively level and thick sown with crystals, quartz, mica, hornblende, feldspar, granite, zircon, tourmaline, etc., weathered out and strewn closely and loosely as if they had been sown broadcast. The Yosemite The minerals at contact are quartz, biotite, magnetite and hornblende. The Long Labrador Trail Some of them are of silex, in others the substance seems to approach to hornblende. Travels in Syria and the Holy Land Yet the surrounding rocks are of the same granite, mixed with a little hornblende, which we had found at Javita, and which assumes a syenitic aspect. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 This mountain consists of hornblende rock; in one place, of hornblende slate, with very beautiful large crystals. The Former Philippines thru Foreign Eyes The porphyries containing vitreous feldspar and hornblende, the phonolite, the greenstone, the amygdaloids, and the basalt, have forms almost as invariable as simple crystallized substances. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 Strange, scholastic, didactic, passionless, bloodless man, who denotes classes of souls as a botanist disposes of a carex, and visits doleful hells as a stratum of chalk or hornblende! Representative Men In the argil are imbedded small crystals of hornblende, or of mica, and thin pieces of quartz at most two lines square. Travels in Syria and the Holy Land When in fragments, they might be taken at first sight for basalt or hornblende.* Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 In an hour after our departure we reached the little island of Majava, which consists of perpendicular strata of a hard, fine-grained, volcanic tufa, with small, bright crystals of hornblende. The Former Philippines thru Foreign Eyes The rock does not contain hornblende, but great crystals of foliated olivine, which have a triple cleavage.* Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The red is due to the grinding up of mica and hornblende. Ragnarok : the Age of Fire and Gravel The bed of the creek was full of blocks of Sienite, of hornblende Porphyry, of greenish Pegmatite, and of cellular Basalt. 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 The nature of the phonolites, which are lithoid lavas with a feldspar basis, and the nature of the green slates intermixed with hornblende, oppose this opinion. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 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 Instead of garnets we met with a few solitary crystals of hornblende. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 When mica and hornblende are ground up, the result is blue or red clays, as the oxidation of the iron turns the clay red; while the clay made of feldspar is light yellow or white. Ragnarok : the Age of Fire and Gravel Farther down sienite was observed, which contained so much hornblende as to change occasionally into hornblende rock, with scattered crystals of quartz. 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 I observed neither hornblende, black schorl, nor rutile titanite, in this granite. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 In many places basalt in piles and crumbling strata of hornblende schiste, disposed edgeways, green within, and without blackened by sun and rain, cropped out of the ground. Personal Narrative of a Pilgrimage to Al-Madinah & Meccah — Volume 2 These balls are composed of lamellar feldspar and hornblende closely commingled. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 1 The aluminous minerals contained in granite rocks are feldspar, mica, and hornblende. Ragnarok : the Age of Fire and Gravel I observed Pegmatite of a white colour, and hornblende Porphyry and Diorite. 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 both these states I could not discover in it either garnets, hornblende, or diallage. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 "So you don't know the difference between augite and hornblende?" he once enquired. South Wind DIORITE, still less siliceous, is composed of hornblende and feldspar,—the latter mineral being of different variety from the feldspar of granite and syenite. The Elements of Geology Mica and hornblende contain considerable oxide of iron, while feldspar has none. Ragnarok : the Age of Fire and Gravel Its higher part was composed of sandstone and conglomerate; but a coarse-grained granite, with much quartz and felspar, but little mica and accidental hornblende, was below. 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 The colouring matter does not penetrate the stone, which is coarse-grained granite, containing a few solitary crystals of hornblende. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 It differs from granite in having hornblende as a substitute for mica, and being without quartz. The Student's Elements of Geology This greenstone must, I conceive, be considered as metamorphosed hornblende- slate. Geological Observations on South America Mica and hornblende generally contain considerable oxide of iron, while feldspar usually yields only a trace or none. Ragnarok : the Age of Fire and Gravel It is formed in strata of Old Red Sandstone, volcanic tufa, ignis fatuus, and bicarbonate of hornblende, superimposed upon argillaceous shale, and contains the prints of prehistoric man. Mark Twain's Letters — Volume 4 (1886-1900) The hornblende contains also some carbon, like the Lydian stone and kieselschiefer. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 Werner at least considered syenite as a binary compound of feldspar and hornblende, and regarded quartz as merely one of its occasional minerals. The Student's Elements of Geology Not unfrequently quartz and hornblende are arranged in layers in almost amorphous feldspar. Geological Observations on South America When a small fragment is heated in the blowpipe, the black specks are easily fused into black brilliant beads, which become magnetic,—characters that apply to no common mineral except hornblende or augite. Volcanic Islands Dark trappean rocks full of hornblende have in many places burst through these schists, and appear in nodules on the surface. A Popular Account of Dr. Livingstone's Expedition to the Zambesi and its tributaries And of the Discovery of Lakes Shirwa and Nyassa, 1858-1864 Taking a general view of the primitive formation of Atures, we perceive, that, like the granite of Syene in Egypt, it is a granite with hornblende, and not a real syenite formation. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 When the hornblende and feldspar are in nearly equal quantities, and the rock is not slaty, it corresponds in character with the greenstones of the trap family, and has been called "primitive greenstone." The Student's Elements of Geology I nowhere observed mica in this formation, and rarely hornblende; where the latter mineral did occur, I was generally in doubt whether the mass really belonged to this formation, or was of intrusive origin. Geological Observations on South America These brown-coloured, compact lavas, consist almost entirely of small glimmering scales, or of minute acicular crystals, of feldspar, placed close by the side of each other, and abounding with minute black specks, apparently of hornblende. Volcanic Islands He sat upon the hornblende sofa, took out the stump of his cigar, lighted it, and gazed at the graceful figures in "The Storm" on the opposite wall. The Voice of the City: Further Stories of the Four Million Many of the layers are entirely destitute of hornblende. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 HORNBLENDE-SCHIST is usually black, and composed principally of hornblende, with a variable quantity of feldspar, and sometimes grains of quartz. The Student's Elements of Geology The ordinary granite of Aberdeenshire," says Dr. MacCulloch, "is the usual ternary compound of quartz, feldspar, and mica; though sometimes hornblende is substituted for the mica. The Student's Elements of Geology I did not observe in any specimen distinguishable crystals of hornblende or augite; I except the fused grains in the ejected fragments, and in the pinnacle of the little crater, above described. Volcanic Islands He sat upon a hornblende couch and gazed, with satiated eyes, at Art Brought Home to the People in the shape of "The Storm" tacked against the wall. The Voice of the City: Further Stories of the Four Million The little fragment which I procured indicated a stratified rock, rich in white feldspar, and containing, together with spangles of mica, grouped in streaks, and variously twisted, some crystals of hornblende. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 It may be termed hornblende rock, or amphibolite. The Student's Elements of Geology The same author mentions, that in Shetland a granite composed of hornblende, mica, feldspar, and quartz graduates in an equally perfect manner into basalt. The Student's Elements of Geology Amidst the hillocks composed of these rocks, I found in three places, smooth conical hills of phonolite, abounding with fine crystals of glassy feldspar, and with needles of hornblende. Volcanic Islands In Hungary there are varieties of trachyte, which, geologically speaking, are of modern origin, in which crystals, not only of mica, but of quartz, are common, together with feldspar and hornblende. The Student's Elements of Geology We saw between Muitaco and the island of Ceiba a hill entirely composed of balls with concentric layers, in which we perceived a close mixture of hornblende and feldspar, with some traces of pyrites. Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 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 Next to quartz, which is nearly pure silica or silicic acid, the most important are those silicates commonly classed under the several heads of feldspar, mica, hornblende or augite, and olivine. The Student's Elements of Geology SECONDLY, a brick-red mass of feldspar, quartz, and small dark patches of a decayed mineral; one minute particle of which I was able to ascertain, by its cleavage, to be hornblende. Volcanic Islands In addition to these characters, it was remarked as a geological fact, that augite and hornblende are very rarely associated together in the same rock. The Student's Elements of Geology This name has usually been extended to all granular mixtures, whether of hornblende and feldspar, or of augite and feldspar. The Student's Elements of Geology When it alternates with these rocks, it often contains some crystals of mica, and occasionally quartz, feldspar, hornblende, talc, chlorite, garnet, and other minerals. The Student's Elements of Geology Through the base are usually disseminated crystals of glassy feldspar, mica, and sometimes hornblende. The Student's Elements of Geology These rocks possess an extremely varying character; they consist of black, brown, and grey, compact, basaltic bases, with numerous crystals of augite, hornblende, olivine, mica, and sometimes glassy feldspar. Volcanic Islands It was also found by analysis that augite usually contained more lime, less alumina, and no fluoric acid; which last, though not always found in hornblende, often enters into its composition in minute quantity. The Student's Elements of Geology This view was confirmed by the fact that Mitscherlich and Berthier were able to make augite artificially, but could never succeed in forming hornblende. The Student's Elements of Geology In some places the siliceous matter of the schist becomes a granular quartz; and when hornblende and mica are added, the altered rock loses its stratification, and passes into a kind of granite. The Student's Elements of Geology Lastly, Gustavus Rose fused a mass of hornblende in a porcelain furnace, and found that it did not, on cooling, assume its previous shape, but invariably took that of augite. The Student's Elements of Geology The feldspar and hornblende in this and the succeeding cases have been determined by the reflecting goniometer, and the quartz by its action under the blowpipe. Volcanic Islands Miascite is one of the varieties of syenite most frequently spoken of; it is composed chiefly of orthoclase and nepheline, with hornblende and quartz as occasional accessory minerals. The Student's Elements of Geology In Syenite quartz is rare or wanting, hornblende taking the place of mica, and the proportion of silica not exceeding 50 to 60 per cent. The Student's Elements of Geology By this process, fossil shells or corals may often lose their carbonic acid, and the residual lime may enter into the composition of augite, hornblende, garnet, and other hypogene minerals. The Student's Elements of Geology The quadruple compound of quartz, feldspar, mica, and hornblende, may be termed Syenitic Granite, and forms a passage between the granites and the syenites. The Student's Elements of Geology FIRST, a white syenite, streaked and mottled with red; it consists of well- crystallised feldspar, numerous grains of quartz, and brilliant, though small, crystals of hornblende. Volcanic Islands |
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