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Books Books 1 - 8 of 8 on 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 - Page 161
by Geological Survey (U.S.) - 1910
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Bulletin, Issue 76

Chromium - 1918 - 248 pages
...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, Issue 17

Gold mines and mining - 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 - Manganese - 1910 - 298 pages
...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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The Cosna-Nowitna region, Alaska, Issues 664-667

Henry Miner Eakin - Geology - 1918 - 54 pages
...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 - Geology, Economic - 1921 - 610 pages
...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, Volume 45

Julius Morgan Clements - Geology - 1903 - 463 pages
...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, Issue 936

Thomas Lingle Kesler, Jerry Chipman Olson - Geology - 1942 - 38 pages
...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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Bulletin, Volume 670

Geology - 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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