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Books Books 1 - 5 of 5 on ... dark reddish-brown or chocolate-colored clayey soil on decomposition. Black stains....
" ... dark reddish-brown or chocolate-colored clayey soil on decomposition. Black stains of manganese are associated with many of the soils derived from hornblendic rocks. A clew to the nature of the... "
Contributions to Economic Geology, 1907: Metals and nonmetals, except fuels - Page 279
by Waldemar Lindgren, Marius Robinson Campbell, Charles Willard Hayes - 1908
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Bulletin - United States Geological Survey, Issue 340

Geological Survey (U.S.) - Geology - 1908
...associated with many of the soils derived from hornblendic rocks. •A clew to the nature of the rode formations in a given region is often furnished by...hornblende, etc., are characteristic of the Roan gneiss. Ot'CURllTCNCE OF MONAZITE. Up to the present time the only deposits of monazite successfully worked...
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Transactions of the American Institute of Mining, Metallurgical ..., Volume 40

Mineral industries - 1910
...rock-formations in a given region is often furnished by the character of the gravels in the bottom-lands and streams draining that region. Thus, in this area...granite, or its contact, or a very highly pegmatized •country-rock. Garnets and hematite iron-ore, with which hlocks •of mica- or cyanite-gneiss are...
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Mining and Metallurgy: Published Monthly by the American ..., Issues 25-36

Mineral industries - 1909
...by the character of the gravels in the bottom-lands and streams draining that region. T\ius, \u \K\% area a very light-colored gravel, with much quartz...granite, or its contact, or a very highly pegmatized country-rock. Garnets and hematite iron-ore, with which blocks of mica- or cyanite-gneiss are associated,...
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Journal of the Elisha Mitchell Scientific Society, Volume 24

Elisha Mitchell Scientific Society (Chapel Hill, N.C.) - Natural history - 1908
...gravels in the bottom lands and streams draining that region. Thus in this area a very light colored gravel with much quartz debris indicates a granite...are characteristic of the Roan gneiss. OCCURRENCE Monazite has been found in several varieties of rocks, in the soils derived from monazite bearing formations,...
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Mining and Metallurgy, Volumes 25-30

Mineral industries - 1909
...rock-formations in a given region is often furnished by the character of the gravels in the bottom-lands and streams draining that region. Thus, in this area...granite, or its contact, or a very highly pegmatized country-rock. Garnets and hematite iron-ore, with which blocks of mica- or cyanite-gneiss are associated,...
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