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Books Bücher 1 - 10 von 13 in The country rock is jasper, thin layered and separated by seams of shale. The jasper...
" The country rock is jasper, thin layered and separated by seams of shale. The jasper layers differ in thickness from a fraction of an inch to several feet. The same layer varies in thickness, pinching out locally In many places. Most of the shale seams... "
Bulletin - United States Geological Survey - Seite 161
von Geological Survey (U.S.) - 1910
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Bulletin, Ausgabe 76

1918 - 248 Seiten
...in recent years and no ore shipped since 1896. This deposit is described by EC Harder* as follows: "The country rock is jasper, thin layered and separated...thickness from a fraction of an inch to several feet thick. The same layer varies in thickness, pinching out locally in many places. Most of the shale seams...
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Report of the State Mineralogist, Ausgabe 17

1921
...first opened in 1885 and some small shipments made. This deposit is described by EC Harder as follows: "The country rock is jasper, thin layered and separated...places. Most of the shale seams are thin. Both shale and jasper are greenish gray, except where stained red or black V1v iron or manganese. "The ore occurs...
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Manganese Deposits of the United States with Sections on Foreign Deposits ...

Edmund Cecil Harder - 1910 - 298 Seiten
...frequently in kidneys or wormlike aggregates. It is generally soft and is mixed with considerable clay. (6) The main mass of ore occurring along the fissure is...layer varies in thickness, pinching out locally In manyplaces. Mostof the shale seams are thin. Both shale and jasper are greenish gray except where stained...
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Manganese Deposits of the United States with Sections on Foreign Deposits ...

Edmund Cecil Harder - 1910 - 298 Seiten
...jasper wall is very hard, with either amorphous or finely crystalline structure. The forrnergenerally has a steel-gray luster, and the latter is bluish....places. Most of the shale seams are thin. Both shale and jasper are greenish gray except where stained red or black by iron or manganese. The dip of the layers...
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The Cosna-Nowitna Region, Alaska

Henry Miner Eakin - 1918 - 54 Seiten
...dirtygray sandstone containing thin calcareous beds and numerous lenses and layers of sandy shale ranging in thickness from a fraction of an inch to several feet. The distribution of the oil in the sand is probably dependent to a considerable degree on differences in...
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Geology of Petroleum

William Harvey Emmons - 1921 - 610 Seiten
...dirty-gray sandstone containing thin calcareous beds and numerous lenses and layers of sandy shale ranging in thickness from a fraction of an inch to several feet. The distribution of the oil in the sand is dependent on System Series Group Formation Character Thickness...
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The Vermilion Iron-bearing District of Minnesota: With an Atlas

Julius Morgan Clements - 1903 - 463 Seiten
...constituting the slates, and by a slight difference in size of grain. These bands within the slates vary in thickness from a fraction of an inch to several feet. The bands of slate themselves, where interlaminated with grits and near the conglomerates, also vary in...
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Muscovite in the Spruce Pine District, North Carolina, Ausgabe 936

Thomas Lingle Kesler, Jerry Chipman Olson - 1942 - 38 Seiten
...schist is generally not distinct; the two are commonly separated by a transitional zone which varies in thickness from a fraction of an inch to several feet. The topaz rock retains either a faint banding (see pi. 8, B) or the pattern of a breccia (see pi. 8, (3),...
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Nuclear Science Abstracts

1960
...area the veins — called "siliceous reefs" — strike east to northeast, are of steep dip, and vary in thickness from a fraction of an inch to several feet. The country rock is granodiorite containing, in order of abundance, plagioclase (Anw to AnM), quartz, orinecíase,...
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Bulletin, Ausgabe 670

1918
...dirtygray sandstone containing thin calcareous beds and numerous lenses and layers of sandy shale ranging in thickness from a fraction of an inch to several feet. The distribution of the oil in the sand is probably dependent to a considerable degree on differences in...
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