| 单词 | quartzite |
| 例句 | Child- and dog-friendly features include durable quartzite counters and a matte finish on the floors to help protect against scratches from little hands and paws. These city dwellers loved their rowhouse, but it was too small. So they doubled it. 2018-03-06T05:00:00Z Among the massive limestone blocks toppled in the fourth century was a huge quartzite block with an engraving of a pharaoh. Divers explore sunken ruins of Cleopatra's palace 2010-05-25T21:56:00Z It's the oldest item on display, but in better shape than some exhibit pieces from 2,000 years later — including a colossal quartzite statue of Tutankhamun himself. 'Tutankhamun' in Seattle: artifacts both dazzling and humble 2012-05-25T05:42:18Z But many items do remain in Egypt, including the mummy of the 19-year-old ruler, the quartzite sarcophagus with granite lid, the gilded wooden outer coffin and a series of wall paintings. King Tut gets a remodel: How conservators are trying to protect the tomb from tourists 2018-03-27T04:00:00Z Bracketing those sunny communal spaces are a master suite and a courtyard; framed by more projecting quartzite, the latter spot is partially sheltered by a broad roof overhang. Take in an Aspen Home's Spectacular View 2015-05-05T04:00:00Z He later scanned the pebble and reproduced its exact dimensions on a larger scale in a shimmering quartzite that resembles the surface of the moon. Salon 94 Shows Martin Szekely’s Stone-Inspired Tables 2015-05-15T04:00:00Z Before he knew it, he was digging into scientific journals, interviewing scientists and making regular jaunts to eastern Nevada's Wheeler Peak, the rugged quartzite mountain inside Great Basin National Park where the tree once stood. Artist still pines for Prometheus, the Methuselah of bristlecones 2015-02-27T05:00:00Z Opposite the cedar in the entrance hall, a quartzite wall rises to the second level, where it becomes the living area’s fireplace surround and chimney breast. Take in an Aspen Home's Spectacular View 2015-05-05T04:00:00Z It was an overcast day, but the sun broke through the clouds just before the ceremony, bringing out the sparkle in LeBlond’s dress and the quartzite rock formation. First she faced her fear of heights, then she took on something even scarier: Remarriage 2021-11-12T05:00:00Z The thin layers of locally quarried quartzite at his seminal thermal baths in Vals, designed as an assembly of great masonry cubes, are but a decorative cladding to reinforced concrete walls behind. Peter Zumthor: RIBA awards gold medal to architecture's man of mystery 2013-02-05T15:00:56Z In the afternoon we drive south to Seneca Rocks, the magnificent rocky tower of white-gray Tuscarora quartzite rising 900 feet above the North Fork River in Monongahela National Forest. In West Virginia, my family tried to connect with the land — and disconnect from our devices 2019-09-04T04:00:00Z The westward-facing seaboard of Jura has been sculpted into a procession of quartzite cliffs, caves and raised beaches that are as remote and inaccessible as any in Scotland. Scotland’s best Highland bothy weekend adventures 2020-02-29T05:00:00Z Similarly, protruding planes of quartzite extend perpendicularly from the house into the surrounding meadow in a literal embrace of nature. Take in an Aspen Home's Spectacular View 2015-05-05T04:00:00Z Crafted from layers of local quartzite, they are truly beautiful and sited well away from the summer crowds of Swiss cities. Peter Zumthor unveils secret garden for Serpentine pavilion 2011-04-04T16:40:31Z A fragment of a colossal but mediocre quartzite Tut statue that once stood outside the mortuary chamber is bathed in a pulsing sound-and-light show. How good is the King Tut exhibition? An art critic weighs in 2018-03-29T04:00:00Z The government is currently battling to prevent the auction of an 18th Dynasty quartzite sculpture god Amen in the likeness of King Tutankhamun scheduled for next month at Christie’s in London. Cairo's 'mother of Egyptian museums' set for revamp 2019-06-16T04:00:00Z And lots of stone, predominantly limestone and quartzite, plus a little schist — the coarse rock, often featuring dark bands, that glints in the light and dominates much of the surrounding region. In Portugal’s mountains, an ecotourist haven rises from abandoned stone villages 2017-03-09T05:00:00Z Rush-hour traffic delays my arrival, but multiple hosts, gathered near a quartzite counter used by Silverman’s daytime coffee shop, which occupies the front of the space, assure me my tardiness is no problem for them. Pineapple and Pearls is already living up to its lofty expectations — and price 2016-04-15T04:00:00Z There were also mines in the Sinai for turquoise, alabaster, and quartzite. World History: to 1500 2023-04-19T00:00:00Z Its exteriors are covered in quartzite rock arranged to evoke Indigenous basket weave patterns; from crevices emerge bursts of desert plants. How a new Tucson memorial found a way to mourn mass-shooting victims 2023-01-26T05:00:00Z A Wacker spokesperson would not comment on the U.S. detainments but said the company sources quartzite from suppliers in Norway, Spain and France. Exclusive: U.S. blocks more than 1,000 solar shipments over Chinese slave labor concerns 2022-11-11T05:00:00Z Native Americans came to what became Fairfax Villa Park for Popes Head Creek as well as the quartz, quartzite cobbles, and soapstone still found within the park. Not much changes in Fairfax Villa, and residents like it that way 2022-09-14T04:00:00Z What remains of the Guadalperal complex is a ring of quartzite, 117 feet in diameter, surrounding 144 jagged granite standing stones, many of which are no longer standing. With Drought, ‘Spanish Stonehenge’ Emerges Once Again 2022-09-09T04:00:00Z A block of quartzite on Earth is composed of materials that have gone through all four of these states. Astronomy 2016-10-13T00:00:00Z Limestone will be metamorphosed to marble, and sandstone to quartzite. Physical Geology 2015-01-01T00:00:00Z Or it can cause quartz sandstone to metamorphose into the quartzite such the Big Cottonwood Formation in the Wasatch Range of Utah. An Introduction to Geology 2017-01-01T00:00:00Z There was custom tilework and a gray quartzite countertop with some movement in the grain. These ceramicists prove that what we eat on matters 2022-02-17T05:00:00Z “Countertops have gone from stone to almost exclusively quartz or quartzite,” Brennan says. Enrich the kitchen: How to add style and substance to your home’s command center | Produced by Seattle Times Marketing 2022-01-20T05:00:00Z If you can afford quartzite countertops and custom cabinets at a time when millions of Americans live in poverty, your splurge brings inequity into focus. How much did that new kitchen cost? No one’s going to tell you 2021-12-30T05:00:00Z Some examples of non-foliated metamorphic rocks are marble, quartzite, and hornfels. Physical Geology 2015-01-01T00:00:00Z In addition, rock flour as fine grit in the ice can polish a hard granite or quartzite bedrock to a smooth surface called glacial polish. An Introduction to Geology 2017-01-01T00:00:00Z Walls of glass cover the backside of the home, and other highlights include heated floors, porcelain walls and a quartzite kitchen. In Malibu, a $40-million home rises from Suzanne Somers’ empty land 2021-12-14T05:00:00Z “Quartz” refers to engineered quartz, while “quartzite” is the natural stone version of the quartz product, she says. Enrich the kitchen: How to add style and substance to your home’s command center | Produced by Seattle Times Marketing 2022-01-20T05:00:00Z The floors are a mixture of deep green Brazilian avocado quartzite, interspersed with sections of cement in irregular shapes, evoking a nautical flag. A Parisian Home That Breaks With Tradition 2021-09-22T04:00:00Z Even if formed during regional metamorphism, quartzite does not tend to be foliated because quartz crystals don’t align with the directional pressure. Physical Geology 2015-01-01T00:00:00Z The two most common examples of non-foliated rocks are quartzite and marble. An Introduction to Geology 2017-01-01T00:00:00Z And he is creating vanities out of veined-white Brazilian quartzite, which he first used for upscale kitchen counters. Bathrooms go super luxe as a place to retreat, relax and find time for yourself 2021-08-31T04:00:00Z The complete makeover included new cabinetry, quartzite countertops, porcelain tile on the floor, a double oven, a built-in microwave, a beverage center and a glass door in the pantry to admit more natural light. A ‘warm, welcoming’ Colonial in Arlington, Va. 2021-07-29T04:00:00Z The kitchen was updated with new cabinetry and quartzite countertops and backsplash. Not just a high-end D.C. townhouse, but a destination 2020-08-06T04:00:00Z Metamorphic rocks formed in environments without strong directed pressure include hornfels, marble, and quartzite. Physical Geology 2015-01-01T00:00:00Z In quartzites, the quartz grains from the original sandstone are enlarged and interlocked by recrystallization. An Introduction to Geology 2017-01-01T00:00:00Z The dry, freezing winters were as foreign as the distinct, pink Sioux quartzite that made up old buildings across the city. 'Is pork essential?' In a Smithfield town, a coronavirus-plagued meat factory comes back to life 2020-05-29T04:00:00Z These products are created using a wide variety of stone, including granite, quartz, quartzite, soapstone and marble. Dubuque business sees steady growth in stone products 2020-02-09T05:00:00Z The 3,000-year-old, brown quartzite bust was part of a statue of the God Amen, the most important deity of the New Kingdom, according to Christie's. Egypt to sue Christie's over Tutankhamun bust 2019-07-09T04:00:00Z The rocks in question, quartzite, were discovered by researchers at Columbia University, thanks to a grant from the National Geographic Society. 'Impossible' discovery found on remote island off African coast: A 'lost part of the world' 2019-03-18T04:00:00Z A defining characteristic for distinguishing quartzite from sandstone is that when broken with a rock hammer, the quartz crystals break across the grains. An Introduction to Geology 2017-01-01T00:00:00Z Her design called for two eight-and-a-half-ton pieces of carbon gray quartzite machined to be smooth on the sides and rippled on the top. What the Provincetown AIDS Memorial Leaves Out 2018-07-27T04:00:00Z Most were made of quartzite and quartz rock that probably came from the foothills of the Qinling Mountains, five to 10 km to the south of the dig site. Earliest evidence of humans outside Africa 2018-07-11T04:00:00Z A sun in the left-hand corner pays tribute to the South Dakota state flag, and the almost red color on the bottom recalls the Sioux quartzite native to the area. Sioux Falls residents push for official flag 2018-06-10T04:00:00Z The presence of quartzite is not the first non-volcanic rock to be found on the island, Live Science added. 'Impossible' discovery found on remote island off African coast: A 'lost part of the world' 2019-03-18T04:00:00Z Because most sandstones are rich in quartz, and quartz is a mechanically and chemically durable substance, quartzite is very hard and resistant to weathering. An Introduction to Geology 2017-01-01T00:00:00Z After slicing off one end of the quartzite stone, he discovered the interior was bright white, while the exterior and carvings were much darker. Is This Inscribed Stone a Notorious Forgery—or the Answer to America’s Oldest Mystery? 2018-05-29T04:00:00Z The massive pink quartzite gem sparkles in the setting of a downtown to be proud of. Excerpts from recent South Dakota editorials 2018-02-08T05:00:00Z Some of the depressions are marked with simple quartzite headstones. A search of James Madison’s Virginia estate uncovers evidence of slaves who lived on his land 2018-01-02T05:00:00Z In the 1980s, there were "scattered outcroppings" of quartzite, but nothing like the discovery Class and her team found in September 2018. 'Impossible' discovery found on remote island off African coast: A 'lost part of the world' 2019-03-18T04:00:00Z Marble and quartzite often look similar, but these minerals are considerably softer than quartz. An Introduction to Geology 2017-01-01T00:00:00Z The flat quartzite stone is five feet long and shaped liked an Indian arrowhead. Michigan man creates custom headstone for wife 2017-12-10T05:00:00Z Nanda selected quartzite kitchen counters that are incorporated into the sink basin. Renovating the 'Pointy House' gives designers a chance to try out their ideas in a real-life setting 2017-09-20T04:00:00Z The Harpers Ferry area is also home to more than 20 miles of trails, including the Appalachian, with its panoramic views of the river and quartzite rock formations. 5 day trips out of D.C., each less than two hours away 2017-08-30T04:00:00Z Siliceous stones include granite, slate, quartzite, soapstone, and sandstone. Seven tips for cleaning natural stone | Provided By Seal Team One 2017-05-15T04:00:00Z Another way to distinguish marble from a quartzite is with a drop of dilute hydrochloric acid. An Introduction to Geology 2017-01-01T00:00:00Z Some homeowners who like marble but do not want to deal with its upkeep are choosing quartzite as an alternative. With countertops, quartz has supplanted granite as the people’s choice 2017-01-19T05:00:00Z The goal of the treaty was to slow the encroachment of white settlers while ensuring Indian access to the pipestone they considered sacred, found layered deep in the quartzite beneath the topsoil. Pipestone National Monument fulfills a promise in stone 2016-09-17T04:00:00Z The countertops were quartzite, a very durable natural stone. Condo renovation achieves resort-style living 2016-08-31T04:00:00Z Part of the plan called for removing quartzite rock pathways and replacing them with concrete. Compromise to spare stone pathways in historic park rejected 2016-06-16T04:00:00Z Built in 1903 as The Andrew Kuehn Co. building, the quartzite building originally housed a wholesale grocery distribution center and warehouse. Will megadeal bring new life to old properties? 2016-03-28T04:00:00Z Weathered ceiling beams in the living room remind her of driftwood, and quartzite flooring in the entryway evokes sea-smothered rocks along the shore. A Home in Quintessential Nantucket Style 2015-09-24T04:00:00Z It’s a rich red, sandwiched between pinkish layers of quartzite. Pipestone National Monument fulfills a promise in stone 2016-09-17T04:00:00Z He heard “no” for almost three years as he sought to restore historical quartzite boundary markers that line the North Dakota-South Dakota border. Group sets out to preserve border markers between Dakotas 2015-07-12T04:00:00Z The speckled rock, which appears to be a quartzite, shows the tiny peck marks that Kinsman said were probably made by the toolmaker as he shaped the stone. Landslide turns up ancient tool near Sitka 2015-03-08T05:00:00Z Below these is a monotonous succession of shales, practically unfossiliferous, with occasional quartzites and limestones representing the Upper and Middle Jurassic with at the base beds probably belonging to the Lias. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z They are excessively variable in their mineralogical composition, and very often alternate in thin seams with biotite hornfels and indurated quartzites. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 6 "Home, Daniel" to "Hortensius, Quintus" 2012-03-15T02:00:32.250Z His first eventually reached 18 feet deep after 36 years of removing quartzite to get to the downward sloping pipestone. Pipestone National Monument fulfills a promise in stone 2016-09-17T04:00:00Z Snyder is looking for donated surveying time, donated gravel, concrete and maybe enough cash to purchase a highway historical marker, explaining the significance of the quartzite stone. Group sets out to preserve border markers between Dakotas 2015-07-12T04:00:00Z The ore body is a bed of quartzite lying nearly flat, and averaging in the neighborhood of only $2.50 per ton in gold, the only mineral of value. The Business of Mining A brief non-technical exposition of the principles involved in the profitable operation of mines 2012-02-18T03:00:17.387Z Associated with the limestones and calc-gneisses are quartzites and tourmaline-biotite schists which probably represent the lowest portions of the shales immediately overlying the limestones. Mount Everest the Reconnaissance, 1921 2012-04-12T02:00:28.417Z Cut out of hard quartzite sandstone, they represented Amon-em-hat iii., the creator of the Fayyûm, and their discoverer calculates that they were each thirty-five feet in height. The Egypt of the Hebrews and Herodotos 2012-02-14T03:00:25.940Z A family from Hot Springs, South Dakota works the quartzite a few feet from Erickson. Pipestone National Monument fulfills a promise in stone 2016-09-17T04:00:00Z Diagram showing the relation of the Potsdam sandstone to the quartzite at the Upper Narrows 67 27. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Other hard rocks such as chert, quartzite, felsite, granite, sandstone and volcanic rocks very frequently are largely represented in gravels, while coal, limestone and shale are far less common. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" 2011-11-28T03:00:19.517Z It appears to us from its use to have been either a quartzite or a fissile limestone. De Re Metallica, Translated from the First Latin Edition of 1556 2011-11-16T03:00:21.977Z 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 The ground gently quakes as the quartzite fights back. Pipestone National Monument fulfills a promise in stone 2016-09-17T04:00:00Z Cross section of the marginal ridge of the moraine on the crest of the quartzite range 108 41. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z There are several series of parallel beds, interstratified with quartzite and schist, the most important being the “main reef” series. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z He admits, however, that the stupendous thicknesses of red sandstones, quartzite, and hematitic iron ores of the later Proterozoic prove that by that date there was an abundance of atmospheric oxygen. Climatic Changes Their Nature and Causes 2011-10-28T02:00:24.840Z On it rest a series of durable quartzite beds inclined to the horizontal, forming about 800 ft. more of the lower canyon wall. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z Inside both shells were chunks of ochre-stained quartzite rock apparently used to grind the mixture. Prehistoric Painters Planned Ahead 2011-10-13T19:01:00Z Generally speaking, the region is an undulating plain, above which rise a few notable elevations, chief among which are the Baraboo quartzite ranges, marked by diagonal lines on Plates I and II . The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The researchers say the ochre was probably rubbed on quartzite slabs to create a fine powder. 100,000-Year-Old Art Studio Discovered 2011-10-13T18:15:00.447Z The rock along this northern side of the mountainous promontory of Banagh is chiefly quartzite, but in some places, as Sturrell, a rotten schist. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z It is particularly displayed around masses of granite, where sandstones are found altered into quartzite, shales and grits into schistose compounds, and where sometimes fossils are still recognizable among the metamorphic minerals. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" 2011-09-19T02:00:10.473Z The Twelve Bens owe their supremacy to the quartzites, which are here well bedded and associated with limestone and mica-schist. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z Origin of the topography.—The topography of the plain surrounding the quartzite ridges, especially that part lying west of Devil's lake, is then an erosion topography, developed by running water. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Another out of many theories1 is that the hard beds of quartzite are denuded by the disintegration of the softer layers. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" 2011-06-19T02:00:16.580Z Most of these summits are of quartzite, with short heavy screes, white and extremely barren. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z Long, dyked ridges, foam-tipped with snow-white quartzite rocks, stretched away to infinity, north and south; here and there a naked granite finger pointed to the cloudless sky. Lodges in the Wilderness 2011-06-15T02:00:17.057Z 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 Like the sandstone, the quartzite is in layers. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The brilliantly coloured quartzites of the Selkirks belong to an age so remote that the mere thought of it is enough to make one's head reel. Among the Canadian Alps 2011-05-30T02:00:16.600Z It is composed chiefly of disintegrating quartzite, flanked on the west by igneous rocks. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z In places on the top of the block, at the head of Death and Avalanche Canyons, for example, are seen the inclined layers of limestone, quartzite, and shale belonging to the less ancient Paleozoic era. Grand Teton [Wyoming] National Park 2011-05-19T02:00:05.867Z It is a good one, too—a contact vein between lime and quartzite. The Comstock Club 2011-05-18T02:00:16.367Z Unlike the sandstone and limestone, the beds of quartzite are not horizontal. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Even the boulders of the moraine showed signs of having been shifted, some of them huge blocks of quartzite, one I measured 50 X 33 X 24 feet. Among the Canadian Alps 2011-05-30T02:00:16.600Z 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 It is not volcanic, but consists of argillaceous schist and quartzite. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" 2011-04-22T02:00:08.637Z Quartz-rock, or quartzite, is an altered quartzose sandstone or grit; it is generally a white or grayish-yellow rock, very hard and compact. Geology 2011-02-20T03:00:12.660Z Plate VII represents a view near Ablemans, in the Upper narrows, where the nearly vertical beds of quartzite are well exposed. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z 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 Dolerites, diorites, quartzites, schists, and conglomerates all help to form this remarkable mountain. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z It occurs in veins in slaty rocks, associated with jaspers and quartzites rich in magnetite and brown iron-ore. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Hence sands gather near a shore and ultimately become consolidated by various natural cements into sandstones, those cemented by silica being styled quartzites. The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli The position of the beds in the quartzite is not always easy of recognition. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In the south-east of Bosnia the predominant formations are Triassic and Palaeozoic strata with red sandstone and quartzite. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" The rock of Fanet is almost entirely quartzite, a metamorphosed sandstone, often pure and glittering quartz. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z The chief rocks of the Campbell Rand series are limestones and dolomites, with some interbedded quartzites. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2 "Camorra" to "Cape Colony" Pumpkin Hill, a ridge of resistant schist and quartzite, stands on right. Drainage Modifications and Glaciation in the Danbury Region Connecticut State of Connecticut State Geological and Natural History Survey Bulletin No. 30 This sequence of events means that between the deposition of the quartzite and the sandstone, the older formation was disturbed and eroded. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In Russian Poland is a series of conglomerates, quartzites and shales; Some of the beds yield a Paradoxides fauna. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" The northern hills are slate or sandstone, the southern quartzite. Climbing in The British Isles, Vol. II Wales and Ireland 2011-09-23T02:00:23.653Z The Ongeluk volcanic series, consisting of lavas and breccias, conformably overlies the Griquatown series; while the grits, quartzites and conglomerates of the Matsap series rest on them with a great discordance. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 2 "Camorra" to "Cape Colony" The quartzite work from Jebel Ahmar near Cairo stands next, as often very fine design is found in this hard material. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 1 "Edwardes" to "Ehrenbreitstein" These elevations are superimposed on the erosion topography of the underlying rock, showing that the drift came into the region after the sandstone, limestone, and quartzite had their present relations, and essentially their present topography. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In the Rennes basin limestones—often dolomitic—are associated with quartzites and conglomerates; silicious limestones also occur in the Sarthe region. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" The rugged peninsula of Howth, connected by a raised bench with the mainland, is formed of old quartzites and shales, crushed and folded, and probably of Cambrian age. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 7 "Drama" to "Dublin" Leaning over, his fingers on the bank of buttons that controlled the ship, he was peering through the heavy quartzite observation port at something approaching from the right. Planet of the Gods Other minerals extracted include salt, kaolin, chalk, talc, asbestos, gypsum, mica, fluorite, quartzite, antimony, lime, sandstone, slate, and pyrites. Area Handbook for Bulgaria From loose sand to quartzite.—To understand the geography of a region it is necessary to understand the nature of the materials, the sculpture of which has made the geography. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In the lower series are, in descending order, the “Serpulite grits” or “Salterella beds,” the “Fucoid beds” and the “Eriboll quartzite,” which is divided into an upper “Pipe rock” and lower “Basal quartzite.” Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" This series is overlain unconformably by a younger quartzite of similar character, and itself rests upon the crystalline schists. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4 "Diameter" to "Dinarchus" The alkaline water in the rocks joins with the heat produced by the crumpling and crushing forces, acting downward, and from the sides, to transform pure sandstone into glassy quartzite, and clay into slate. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Many of the large assemblages of Guillemots in the British Islands are found where the rock is quartzite, mica-schist, limestone, or chalk. Territory in Bird Life While quartzite is a metamorphic sandstone, it is not to be understood that sandstone cannot be metamorphosed in other ways. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In Spain slates and quartzites, the slates of Rivadeo, more than 9000 ft. thick, are followed by the middle Cambrian beds of La Vega, thick quartzites with limestone, slates and iron ores. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" 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 Sandstone is changed into quartzite, the sand grains being melted so as to become no longer visible to the naked eye. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place Yet this is very far from being the fact, as some varieties of rock, such as quartzite, not unfrequently assume this shape. Volcanoes: Past and Present It is not possible to say how far the process of transformation of sand into quartzite was carried while the formation was still beneath the shallow sea in which it was deposited. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It was the same broad stratum of quartzite which, on coming to the creek, had dipped down into Bunker’s claim; and now Denver knew that others beside himself thought well of that mineral-bearing vein. Silver and Gold A Story of Luck and Love in a Western Mining Camp Carse and Friday, grotesque giants in the bulky sheathings of stiff, many-plied fabric, turned as one and peered through their quartzite face shields to where the navigator's bulging eyes directed them. Hawk Carse The rock becomes a white, granular quartzite, that looks like loaf sugar. Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place It landed, among many other planes, on the transparent, quartzite roof of a vast building and, looking down into the interior, they could see several rows of great dynamos. Astounding Stories of Super-Science, March 1930 On the whole, elevation exceeded degradation, for some parts of the quartzite finally came to stand high above the level of the sea,—the level to which all degradation tends. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z A section of the beryllium-steel casing slid smoothly open, disclosing a thick flawless quartzite port. Pirates of the Gorm Darl crawled along the wing, dragging with him a sheet of flexible quartzite. The Great Dome on Mercury The sands and sandstones become highly crystalline quartzites, spotted with porphyritic developments of silicates. The Economic Aspect of Geology Dirk, followed by Steinholt, hurried across the terrace and, leaving the shelter of its quartzite plates, sought the landing stage. Astounding Stories of Super-Science, March 1930 The present surface therefore does not give an adequate conception of the irregularity of the surface at the close of the period of erosion which followed the uplift and deformation of the quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z There is some gleaming white quartzite mixed with both these shales. The Book of the National Parks The quartzite, which is regarded as probably the highest member of the series, forms prominent ridges due to the more rapid erosion of the phyllites, mica-schists and limestones occupying the intervening hollows. Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy" In fact even quartzite is sometimes called granite in commerce, as in the case of the Baraboo quartzites of Wisconsin, but this is going too far. The Economic Aspect of Geology He turned forthwith, the quartzite Fire Stone in both hands, and hurled it straight at Uya's body as he ran loose from the throw. Tales of Space and Time So high were the crests of the quartzite ranges above their surroundings at that time, that they may well be thought of as mountainous. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z A natural curiosity, regarded with great wonder, exists in 'stone-rivers'; long, glistening lines of quartzite rock débris, which, without the aid of water, slide gradually to lower levels. World's War Events, Vol. I The wearing surface is 1 in. thick, or 1 part Portland cement, 1 part clean, sharp, coarse sand, and 3 parts screened pea gravel, crushed granite, quartzite or hard limestone. Concrete Construction Methods and Costs An aggregation of quartz particles forms sand or sandstone or quartzite. The Economic Aspect of Geology A large quartzite boulder it was afterwards found to measure nearly thirty tons stood embedded in the face of the claim, about three feet above bedrock. Reminiscences of a South African Pioneer Thickness of the quartzite.—The thickness of the quartzite is not known, even approximately. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It is usually separated from the superincumbent beds by a glazed crust of hard, compact sandstone, almost resembling a ferruginous quartzite. The Atlantic Monthly, Volume 18, No. 105, July 1866 The grey-eyed, black-haired young woman turned from the quartzite window through which she had been watching the gathering storm overhead. A World is Born The domestic production has been small, consisting principally of flint pebbles from the California beaches, and artificial pebbles made from rhyolite in Nevada and quartzite in Iowa. The Economic Aspect of Geology Thirty, or even forty, tons was no very unusual weight for these blocks of smooth, water worn quartzite. Reminiscences of a South African Pioneer So far as can now be inferred, the new base-plain toward which the streams cut may have been 400 or 500 feet below the crests of the quartzite ridges. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Sometimes they are very regularly laminated, or assume even the appearance of the hardest quartzite. The Atlantic Monthly, Volume 18, No. 105, July 1866 Another object of quartzite was reported to have fallen, in the autumn of 1880, at Schroon Lake, N.Y.—said in the Scientific American, 43-272 to be a fraud—it was not—the usual. The Book of the Damned The mud or clay becomes a shale, the sand becomes sandstone or quartzite, the marl becomes limestone or marble. The Economic Aspect of Geology And now, when I am on the subject, I may point out that this hard and compact quartzite pebble was also once loose sand. The American Architect and Building News, Vol. 27, Jan-Mar, 1890 When in the process of degradation the quartzite surfaces were reached, the streams encountered a formation far more resistant than the surrounding sandstone and limestone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The hard or silicious rocks which form the immediate region, and the quartzite and crystalline limestone, did not lend themselves, either in the quarry or under the chisel, to such work. Mexico Its Ancient and Modern Civilisation, History, Political Conditions, Topography, Natural Resources, Industries and General Development Mr. C. Carus-Wilson describes the object as a ball of hard, ferruginous quartzite, about the size of a cocoanut, weight about twelve pounds. The Book of the Damned The sandstone of commerce includes the quartzites of Minnesota, South Dakota, and Wisconsin, and the fine-grained sandstones of New York, Pennsylvania, and elsewhere, known to the trade as "bluestone." The Economic Aspect of Geology In Wester broch “the most remarkable things found” were three egg-shaped quartzite pearls “having their surface painted with spots in a blackish or blackish-brown pigment.” The Clyde Mystery a Study in Forgeries and Folklore As the less resistant strata were worn away, the old quartzite ridges, long buried, again became prominent topographic features. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It had been darkened, and one whole wall of the room was made of clear quartzite. The Colors of Space Then I found a piece of flinty rock—I think it was quartzite; and I took off a shoe and struck the rock on the hob nails, over the nest of grass. Pluck on the Long Trail Boy Scouts in the Rockies For furnace linings, the quartzite or ganister must be exceptionally pure. The Economic Aspect of Geology Late in the afternoon we skirted the eastern base of the Murchison Range, the rugged quartzite hills in this part being associated partly with the crow ancestor and partly with the bat. The Belief in Immortality and the Worship of the Dead, Volume I (of 3) The Belief Among the Aborigines of Australia, the Torres Straits Islands, New Guinea and Melanesia As at the Upper narrows, the beds of quartzite here are essentially vertical. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z He had barely reached it and been strapped into the acceleration chair turned to face the long, narrow quartzite port, when the blast-off sirens began screaming their third and final warning. Man of Many Minds A small disk of gray quartzite, having a shallow circular depression in each face. 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 For this purpose siliceous rocks, chiefly quartzites and sandstones, are ground up, mixed with lime as a binder, and fused and pressed into bricks and shapes. The Economic Aspect of Geology The great building was erected, in a taste eminently characteristic of the Middle Kingdom, of great blocks of fine limestone and crystalline quartzite. The Sea-Kings of Crete The ice moved in a general west-southwest direction in this region, and the quartzite in the drift, so far as derived from the local formation, is therefore restricted to a narrow belt. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Paint mortar of quartzite; almost square; depression almost worn through by use; quartz pebble pestle accompanying it. Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879 Second Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1880-81, Government Printing Office, Washington, 1883, pages 307-428 A bell-shaped pestle made of yellowish gray quartzite. 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 Pebbles of the conglomerate are mainly quartz and quartzite. The Economic Aspect of Geology It is, for instance, about ten tons heavier than the quartzite block which forms the sepulchral chamber in the pyramid of Amenemhat III. at Hawara. The Sea-Kings of Crete Like the Devil's lake in glacial time, its basin was an enclosure between the ice on the one hand, and the quartzite ridge on the other. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Mortar of quartzite, the body nearly square and flat; depression round and about four inches in diameter, quite shallow. Illustrated Catalogue Of The Collections Obtained From The Indians Of New Mexico And Arizona In 1879 Second Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1880-81, Government Printing Office, Washington, 1883, pages 307-428 A symmetrical, neatly finished disk of light gray quartzite. 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 It is the chief ingredient of sand, sandstone, quartzite, chert, diatomaceous earth, and tripoli. The Economic Aspect of Geology Small smoothing stone mostly of quartzite, one or two only of basalt. 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 They were horizontal when the sands of the quartzite were accumulating, and where they are found they are sufficient to indicate the original position of the beds. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z This reef-crest is a tongue of quartz and quartzite veining grey granite: it was found dug out and cleared all round by the people. To The Gold Coast for Gold, Vol. II A Personal Narrative 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 In eastern Wyoming is a unique deposit of uranium ore in a quartzite which lies between mica-schist and granite. The Economic Aspect of Geology Round, flattened, or disk-shaped quartzite pounders, medium and small sizes. 90-91. 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 full lines, oblique or vertical, represent the beds of quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Garnet and Winona knew nothing of geology, so they listened with due meekness while the instructed few discoursed learnedly on palæozoic rocks, stratified conglomerates and quartzites. The Luckiest Girl in the School A two-edged celt of gray quartzite, 2� inches long, and three-fourths of an inch wide. 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 Sand, sandstone, and quartzite are also ground up and used in sand-blasts, sandpaper, and for other abrasive purposes. The Economic Aspect of Geology A flat or disk-shaped polishing stone of quartzite. 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 East Bluff at the Upper Narrows of the Baraboo near Ablemans, showing the vertical position of the beds of quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Several mineral substances, quartzite, rubble-stones, gravel, ochre, a sinter-heap—these are less interesting than the seven amber beads which, with some charcoal, completes the list of objects found. Fians, Fairies and Picts The materials of the Lafayette gravel are chiefly pebbles and grains of quartz, with a considerable admixture of quartzite and sandstone. History and Comprehensive Description of Loudoun County, Virginia Sulphide ores in quartzites are likely to develop depressions under erosion. The Economic Aspect of Geology A stone bowl or basin made from an oblong, somewhat oval-shaped quartzite slab, and used for pounding and grinding mesquite beans. 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 Along this zone the quartzite has been broken into angular fragments, and at places the crushing of the fragments has produced a "friction clay." The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The quartzite of the Hills is well crystallized and heavy. Cave Regions of the Ozarks and Black Hills The sandstones and quartzites are usually massive and pure white, of the variety found along Catoctin and Bull Run mountains. History and Comprehensive Description of Loudoun County, Virginia By the side of a water-hole that is sheltered by a tall gum-tree rises a curiously gnarled and weather-beaten face of quartzite rock. Anthropology Small and mostly polished smoothing stones, used chiefly in polishing pottery; all well worn; of jasper, quartzite; or basalt. 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 At the same time that quartz schist was locally developed from the quartzite, crushing probably occurred in other places. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z I have one beautiful specimen of the dark Indian red variety through which passes a narrow line of pale blue, and the yellow quartzite or jasper sometimes shows dendrite markings. Cave Regions of the Ozarks and Black Hills No long Sacramento Valley, stretching away to the south and west of the quartzite upheavals, has here retained and preserved the spoils of those long ages of attrition and denudation. The Atlantic Monthly, Volume 13, No. 79, May, 1864 At Porton, east of Truxillo, the same metamorphism which has changed the ridge of sandstone to a hard quartzite has also changed the ordinary bituminous coal into an anthracite, which is here vertical in position. The Story of a Piece of Coal What It Is, Whence It Comes, and Whither It Goes The compact quartzite of Sioux Falls, Dakota, is being quarried and polished for ornamental purposes. Scientific American Supplement, No. 598, June 18, 1887 Erosion of the quartzite.—When the Huronian beds were raised to the estate of land, the processes of erosion immediately began to work on them. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z These are all zones in quartzite which have been traversed by mineral solutions that have by substitution converted such layers into ore deposits of considerable magnitude and value. Scientific American Supplement, No. 446, July 19, 1884 I was reflecting, I remember, that the formation was undoubtedly one of limestone, with here and there a layer of quartzite, when I was aroused by a shout from Harry. Under the Andes The quartzite is generally regarded as the highest member of the series. The Project Gutenberg Encyclopedia Volume 1 of 28 Owing to the strong weathering action this thickness of quartzite is doubtless much less than it was originally. The Long Labrador Trail From this point of view, the quartzite ranges of today are the partially buried mountains of the pre-Potsdam land of south central Wisconsin. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Its color is from white to pale red, and in many places it is an extremely hard quartzite. New York at the Louisiana Purchase Exposition, St. Louis 1904 Report of the New York State Commission They resembled a carbon formation sometimes found in quartzite, but were many times more brilliant than anything I had ever seen, excepting precious stones. Under the Andes 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 Bowlders of this quartzite were seen along the Nascaupee River long before the first outcrop was reached, showing the general direction of the glacial movement to have been to the southeast. The Long Labrador Trail After all allowances have been made, it is still evident that the thickness of the quartzite is very great. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z 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 We are surrounded by layers of limestone, granite, and quartzite, which are of marked difference both in the quality of hardness and in their ability to withstand the attacks of time. Under the Andes 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 They include granite, greenstone, schist, slate, quartzite, and sandstone, and most of them must have been transported for a long distance. The Antiquity of Man These also were shifted by the waves and shore currents, and finally deposited with the others on the eroded surface of the quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z And hence it may not be hazardous to conclude that very ordinary metamorphic agencies may convert these polar caps into a form of quartzite. Discourses Biological and Geological Essays On the left side, immediately above us, was a precipice some thousand feet in height; on the right a series of massive boulders, of quartzite and granite, misshapen and lowering. Under the Andes Let us call this formation the variegated quartzite. Canyons of the Colorado 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 See larger image The first material to be deposited on the surface of the quartzite as it was submerged, was the coarsest part of the sediment. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z A coarse-grained sandstone and quartzite cropped out in that part of the river situated between the two camps. 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 Mount Webb is flat-topped, isolated, rocky-sided, innocent of all vegetation, of sandstone capped with quartzite, standing out with imposing clearness some five hundred feet above a plain of spinifex and mulga scrubs. Spinifex and Sand So these quartzites are aslant, and though of great geologic thickness, they make but 800 feet of the wall. Canyons of the Colorado The strongest and most lasting cement is siliceous, and sand rocks whose grains are closely cemented by silica, the chemical substance of which quartz is made, are known as quartzites. The Elements of Geology It will be seen that the surface of the quartzite is immediately overlain by conglomerate, but that the conglomerate near its top is younger than that near its base. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z I observed quartzite in several localities, and a hard pudding-stone extending for a considerable distance. 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 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 Your books may have many-colored bindings and differ greatly in their contents; so these quartzites vary greatly from place to place along the wall, and in many places they entirely disappear. Canyons of the Colorado Sandstone may be converted into quartzite, and shale into ARGILLITE, a compact, massive clay rock. The Elements of Geology See larger image Streams which crossed the quartzite ridges on the overlying strata might have held their courses even after their valleys were lowered to the level of the quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z 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 Compact quartz, like that so frequently found in veins, is also found together with granular quartzite. The Student's Elements of Geology 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 Cliffs of such slow-decaying rocks as quartzite and granite when closely jointed accumulate talus in large amounts. The Elements of Geology The narrows in the quartzite.—There are four narrows or passes in the quartzite ridges, all of which are rather striking features. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Those from Chateau-Gontier are formed of very close-grained quartzite granite of a greenish color streaked with black. Manners and Monuments of Prehistoric Peoples Gold has now been detected in almost every kind of rock, in slate, quartzite, sandstone, limestone, granite, and serpentine, both in veins and in the rocks themselves at short distances from the veins. The Student's Elements of Geology Now climb 800 feet and a point of view is reached where the variegated quartzites are seen. Canyons of the Colorado The limestones have recrystallized into marbles, among them the famous marbles of Vermont; the Cambrian sandstones have become quartzites, and the Hudson shale has been changed to a schist exposed on Manhattan Island and northward. The Elements of Geology This narrows also differs from the Lower in that the quartzite on one side is covered with Potsdam conglomerate, which overlies the truncated edges of the vertical layers of quartzite with unconformable contact. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Who would carve these lumps of quartzite when one could carve good oak? Secret Places of the Heart I have seen the Potsdam sandstone on the banks of the St. Lawrence, and on the borders of Lake Champlain, where, as at Keesville, it is a white quartzose fine-grained grit, almost passing into quartzite. The Student's Elements of Geology Above the quartzites there are 500 feet of sandstones. Canyons of the Colorado 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 In the great depression between the quartzite ranges, the moraine bends westward, showing that the ice advanced farther on the lowlands than on the ridges. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The difficulty is occasioned by the presence of numerous cleavage planes developed in the rock after its conversion into quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Beds of gneiss and quartzite, with interstratified limestones, in one of which, 1000 feet thick, occurs a foraminifer, Eozoon Canadense, the oldest known fossil. The Student's Elements of Geology These quartzite schists are to be looked on as metamorphosed quartzite, just as quartzite is metamorphosed sandstone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Hard and fine-grained rocks, such as granite and quartzite, are often not only ground down to a smooth surface but are also highly polished by means of fine rock flour worn from the glacier bed. The Elements of Geology It is in the lee of a high point in the quartzite ridge. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Within this zone there are spots where the fragments of quartzite are so well rounded as to simulate water-worn pebbles. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Igneous rock is associated with the quartzite at a few points. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z At g and h, Plate II there are considerable masses of porphyry, sustaining such relations to the quartzite as to indicate that they were intruded into the sedimentary beds after the deposition of the latter. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z 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 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 A mass of quartzite in situ, in the road through the Upper Narrows near Ableman's. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The darker parts are quartzite, the lighter parts the cementing quartz. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The horizontal beds of Potsdam sandstone may be traced up to the bases of the quartzite ranges, where they may frequently be seen to abut against the tilted beds of quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z All gradations may be found between it and unfoliated quartzite on the one hand and mica schist on the other. The Elements of Geology Massive quartzite in situ in road through Upper Narrows near Ableman's 18 X. Brecciated quartzite 18 XI. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Not only this, but isolated patches of sandstone lie on the truncated edges of the dipping beds of quartzite well up on the slopes, and even on the crest of the ridge itself. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The pebbles and larger masses of the conglomerate are quartzite, like that of the subjacent beds, and demonstrate the source of at least some of the material of the younger formation. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z That the pebbles and bowlders are of quartzite is significant, for it shows that the older formation had been changed from sandstone to quartzite, before the deposition of the Potsdam sediments. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It was under such conditions that the general processes of subaerial erosion operated in south central Wisconsin, after the uplift of the quartzite and before the deposition of the Potsdam sandstone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Diagram showing the structure of the quartzite 15 5. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It was then that the principal features of the topography of the quartzite were developed. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Such streams would have developed narrows at the crossing of the quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z These particular forms have resulted from the peculiar weathering of the quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Being much harder than the Paleozoic rocks, the quartzite ridges again came to stand out as prominent ridges, as the surrounding beds of relatively slight resistance were worn away. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Diagram showing the relation of the Potsdam sandstone to the Baraboo quartzite 16 6. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Beyond the quartzite, the valley again opens out into a broad flat. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Both the sandstone and limestone are much less resistant than the quartzite, and this difference has had much to do with the topography of the region. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The second type of topography affecting the plain about the quartzite ranges is found east of a line running from Kilbourn City to a point just north of Prairie du Sac. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z South or main quartzite range, about 23 miles in length and one to four miles in width, rises 500 feet to 800 feet above the surrounding sandstone plain. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Diagram showing relation of Potsdam conglomerate to quartzite at Devil's Lake 29 10. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z These zones of schistose rock a few inches in thickness were developed from the quartzite by the slipping of the rock on either side. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z In the former position they may be seen on the East bluff at Devil's lake, where horizontal beds of conglomerate and sandstone rest on the layers of quartzite which dip 14� to the north. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The quartzite layers are here on edge, and on them rest the horizontal beds of sandstone and conglomerate. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Although the sandstone appears in patches on the quartzite ranges, it is primarily the formation of the surrounding plains, occupying the broad valley between the ranges, and the territory surrounding them. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z With the possible exception of the Blue mounds southwest of Madison, this quartzite range is the most obtrusive topographic feature of southern Wisconsin. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The quartzite, on the other hand, is the formation of the ridges, though it outcrops at a few points in the plain. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It is the hard and resistant quartzite which forms the ridges, and the less resistant sandstone which forms the lowlands about them. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The sandstone of the plain and the quartzite of the ridges are not everywhere exposed. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The northeast wall of the Upper Narrows, north of Ableman's, showing the horizontal Potsdam sandstone and conglomerate lying unconformably on the quartzite, the beds of which are vertical. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The North or lesser quartzite range lying north of Baraboo is both narrower and lower than the south range, and its crest is frequently interrupted by notches or passes, some of which are wide. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The conversion of the sandstone into quartzite probably preceded the deformation, since many phenomena indicate that the rock was quartzite and not sandstone when the folding took place. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Some idea of the geography of the quartzite at the close of this period of erosion may be gained by imagining the work of later times undone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z There are many hillocks of a general kame-like habit associated with the terminal moraine south of the main quartzite range, and north of the Wisconsin river. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z A hard and resistant rock, such as quartzite, will give rise to more bowlders in proportion to the total amount of material furnished to the ice, than will softer rock. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z At this narrows the quartzite bluffs rise abruptly 500 feet above the river. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z 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 plain west of the moraine just south of the main quartzite ridge has been referred to under valley trains. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The great gap in the main quartzite range, a part of which is occupied by Devil's lake, was a narrows in a preglacial valley. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z If the Baraboo was the stream which flowed through this gorge in preglacial time, the comparable narrows in the north quartzite range—the Lower narrows of the Baraboo—is to be accounted for. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The structure and constitution of the ridges.—The quartzite of the ridges is nothing more nor less than altered sandstone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z As the former land was depressed beneath the sea, its surface was doubtless covered with the products of rock decay, consisting of earths, sands, small bits and larger masses of quartzite. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z This may oftenest be seen near the quartzite ridges, for here only is the base of the formation commonly exposed. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z These patches make it clear that some formation younger than the quartzite once covered essentially all of the higher ridge. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z There is abundant evidence that the subsidence which let the Potsdam seas in over the eroded surface of the Huronian quartzite was gradual. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The popular local belief that the quartzite is of igneous origin is without the slightest warrant. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Before this condition was reached, the quartzite ridges had of course ceased to be islands, and at the same time had ceased to be a source of supply of sediments. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The less resistant sandstone has been removed from about them, and erosion has not advanced so far since the isolation of the quartzite ridges as to greatly lower their crests. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Above the undulating plain developed in the sandstone and limestone, the main quartzite ridge would have risen as a conspicuous ridge 400 to 500 feet. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z During this second incomplete cycle, the quartzite ranges, resisting erosion, came to stand up still more prominently than during the first. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The conversion of sandstone into quartzite is but a continuation of the process which converts sand into sandstone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z From Plate II it will be seen that the moraine as a whole makes a great loop to the eastward in crossing the quartzite range. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The great quartzite range was a barrier to the advance of the ice. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Thus the great loop in the moraine, the head of which is at k, Plate XXXVII, was caused by the quartzite range itself. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Seen from the west, the moraine just north of the south quartzite range stands up as a conspicuous ridge twenty to forty feet above the morainic plain which abuts against it. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z The Potsdam or any other sandstone formation might be converted into quartzite by the same process, and it would then be a metamorphic rock. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Here the edge of the ice, as shown by the position of the moraine, was affected by a re-entrant curve, the two ends of which rested against the quartzite ridge. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z Between the ice on the one hand and the quartzite ridge on the other, a small lake was formed. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z It is, however, certain that the quartzite was deeply eroded, previous to the deposition of the Potsdam sandstone. The Geography of the Region about Devils Lake and the Dalles of the Wisconsin 2011-11-29T03:00:17.347Z |
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