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Books Books 1 - 7 of 7 on Tertiary beds both above and below them at a few places, and must, therefore, be....  
" Tertiary beds both above and below them at a few places, and must, therefore, be of Tertiary Age. As a rule, however, they have no covering, the overlying beds having been removed by erosion, and are high enough above the drainage of the country to be... "
A Preliminary Report on the Bauxite Deposits of Georgia - Page 19
by Thomas Leonard Watson - 1904 - 169 pages
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Report Upon the Condition and Progress of the U.S. National Museum During ...

United States National Museum - Business & Economics - 1901
...varies more or less in color and in chemical composition. (Specimen No. 67600 from Pulaski County.) At a few places it is so charged with iron that attempts...ferruginous kind is exceptional, however. From the dark red varieties it grades through the browns and yellows to pearl gray, cream colored, and milky...
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The American Geologist, Volume 7

Newton Horace Winchell - Geology - 1891
...Saline county. The exposures vary in size from an acre to twenty acres or more, and aggregate something over a square mile. This does not, in all probability,...ore. Some of the samples from these pits assay over .iO per cent of metallic iron. This ferruginous kind is exceptional, however. From the dark red varieties...
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The American Geologist, Volume 7

Newton Horace Winchell - Geology - 1891
...the total thickness undetermined ; the average thickness is at least 15 feet. These Arkansas deposit* occur only in Tertiary areas and in the neighborhood...ferruginous kind is exceptional, however. From the dark red varieties it grades through the browns and yellow to pearl gray, cream-colored and milky white,...
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The American Geologist: A Monthly Journal of Geology and Allied ..., Volume 7

Newton Horace Winchell - Geology - 1891
...cases, but there are, in all probability, many places at which it has not yet been even uncovered. It'is pisolitic in structure, and, like all bauxite, varies...ferruginous kind is exceptional, however. From the dark red varieties it grades through the browns and yellow to pearl gray, cream,colored and milky white,...
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Science, Volume 17

Science - 1891
...country to be readily quarried. Erosive action has removed a part of the bauxite in some cases; bat there are, in all probability, many places at which...and in chemical composition. At a few places it is 10 charged with iron, that attempts have been made to mine it for iron ore. Some of the samples from...
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The non-metallic minerals: Their occurrence and uses

George Perkins Merrill - Geology, Economic - 1904 - 414 pages
...Saline County. "The exposures vary in size from an acre to 20 acres or more, and aggregate something over a square mile." This does not, in all probability,...ferruginous kind is exceptional, however. From the dark- red varieties it grades through the browns and yellows to pearl-gray, cream colored and milky...
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The non-metallic minerals: Their occurrence and uses

George Perkins Merrill - Science - 1910 - 414 pages
...the supposition that there are others as yet undiscovered. Like all bauxite, the Arkansas material varies more or less in color and in chemical composition. At a few places it U so charged with iron that attempts have been made to mine it for iron ore. Some of the samples from...
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