| 单词 | claystone |
| 例句 | If it is dominated by clay, it is called claystone. Physical Geology 2015-01-01T00:00:00Z Rocks exclusively composed of silt or clay sediment, are called siltstone or claystone, respectively. An Introduction to Geology 2017-01-01T00:00:00Z When the felspar assumed the appearance of a slaty claystone, which it did towards the base of the mountains on the banks of the river, we observed no copper in it. A Journey from Prince of Wales's Fort in Hudson's Bay to the Northern Ocean in the Years 1769, 1770, 1771, 1772 New Edition with Introduction, Notes, and Illustrations 2011-12-26T03:00:13.520Z Clearly these things were done recently, or the sea would have wiped out all the traces in the soft claystone. Chronicles of Martin Hewitt 2011-10-24T02:00:16.617Z The zoologist carried a meerschaum; the guides smoked out of Indian calumets of the celebrated steatite, or red claystone. The Hunters' Feast Conversations Around the Camp Fire We see them light their claystone pipes, and send forth clouds of blue vapour. The Scalp Hunters Many of the hills composed of claystone are neatly devoid of vegetation; their surface being bare and smooth, and of a red or black colour. The Mirror of Literature, Amusement, and Instruction Volume 13, No. 359, March 7, 1829 Although fossiliferous, the stone resembles a sandy claystone of the trap family. The Student's Elements of Geology Well, next I turned my attention to the sea-bed, which I was extremely pleased to see was of soft, slimy claystone. Chronicles of Martin Hewitt 2011-10-24T02:00:16.617Z A good section of the lowest fossiliferous mass, about forty feet in thickness, resting on claystone porphyry, is exhibited a few miles south of the harbour. Geological Observations on South America Some of them were sitting around the fire, smoking out of curiously-carved pipes of the red claystone. The Scalp Hunters In some parts of India, the claystone contains numerous small nodules or lumps of clay iron-stone, which seldom exceed the size of a walnut. The Mirror of Literature, Amusement, and Instruction Volume 13, No. 359, March 7, 1829 The second variety is a reddish non-porphyritic claystone, quite full of spherical cavities, about half an inch in diameter, each lined with a collapsed crust formed of crystals of quartz. Geological Observations on South America When these crystals have appeared, and when the basis has become compact, the rock in many places could not be distinguished from a true claystone porphyry without a trace of mechanical structure. Geological Observations on South America This pitchstone, as well as some purple claystone porphyry, certainly flowed in the form of streams. Geological Observations on South America Here and there are idol figures, of grotesque and monster forms, carved from wood and the red claystone of the desert. The Scalp Hunters Eleventhly: sedimentary and tufaceous beds as before, passing into sandstone, including some conglomerate: the pebbles in the latter are of claystone porphyry, well rounded, and some as large as cricket-balls. Geological Observations on South America The pebbles are of claystone porphyries of many varieties; they are tolerably well rounded, and vary in size from a large apple to a man's head. Geological Observations on South America The lower beds were here more jaspery than usual, and they included some white cherty strata and red sandstones, alternating with purple claystone porphyry. Geological Observations on South America The prevailing rock is a purplish or greenish, porphyritic claystone conglomerate. Geological Observations on South America Another variety was of a dull- red colour, having a claystone brecciated basis, including specks of oxide of iron and of calcareous spar, and amygdaloidal with green earth: there were apparently several other varieties. Geological Observations on South America The sandstone varies in thickness from only twenty to eighty feet; and this variation is caused by the inequalities in the upper surface of an underlying stream of purple claystone porphyry. Geological Observations on South America Above the sandstone there is a considerable mass of much indurated, purplish-black, calcareous claystone, allied in nature to the often-mentioned black calcareous slate- rock. Geological Observations on South America Above this conglomerate, there is a black siliceous claystone, and above it numerous alternations of dark-purplish and green porphyries, which may be considered as the uppermost limit of the porphyritic conglomerate formation. Geological Observations on South America |
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