 Halymenites major Lesquereux, is pitted and cylindrical in cross section and is easily recognized. "LARAMIE" FORMATION. The Trinidad sandstone is conformably overlain by a mass of coalbearing sandstone and shale which ranges in thickness from 3,000 feet...  Bulletin of the United States Geological Survey - Page 381by Geological Survey (U.S.) - 1910Full view - About this book
 | H L Fairchild - 1907 - 244 pages
...quartz pebbles of milky color inclosed in a silicious matrix. The pebbles are more or less rounded and vary from a fraction of an inch up to 2 inches in diameter. The texture is an important factor in determining the value and particular use of the finished millstones.... | |
 | Science - 1907 - 748 pages
...quartz pebbles of milky color inclosed in a silicious matrix. The pebbles are more or less rounded and vary from a fraction of an inch up to 2 inches in diameter. The texture is an important factor in determining the value and particular use of the finished millstones.... | |
 | Coal - 1910 - 212 pages
...and H., Chlamys nebrascensis M. and H., Avicula nebrascana E. and S., Inoceramus cripsi var. barabini Morton. This fauna is considered to be upper Montana...vicinity of Tercio, for instance, the conglomerate is 150 feet thick, whereas in the eastern part of the field not more than 20 feet of it has been observed... | |
 | Marius Robinson Campbell - Coal - 1910 - 616 pages
...area under consideration is practically limited to the Trinidad sandstone. This fossil, Halymenitts major Lesquereux, is pitted and cylindrical in cross...vicinity of Tercio, for instance, the conglomerate is 150 feet thick, whereas in the eastern part of the field not more than 20 feet of it has been observed... | |
 | Geological Survey of Canada - Geology - 1919 - 302 pages
...dykes. (3) In quartz veins. In the typical pegmatite dykes the molybdenite occurs as crystals varying from a fraction of an inch up to 2 inches in diameter. The size'of the larger individuals seems to vary according to the distance of the dyke from the parent... | |
 | Geological Survey of Canada - Geology - 1919 - 312 pages
...dykes. (3) In quartz veins. In the typical pegmatite dykes the molybdenite occurs as crystals varying from a fraction of an inch up to 2 inches in diameter. The size of the larger individuals seems to vary according to the distance of the dyke from the parent... | |
 | Mouette Barboff - Grain - 2003 - 476 pages
...quartz pebbles of milky color inclosed in a silicious matrix. The pebbles are more or less rounded and vary from a fraction of an inch up to 2 inches in diameter. The texture is an important factor in determining the value and particular use of the finished millstones."... | |
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