Bulletin - Geological Survey of Alabama, Issue 9

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Geological Survey of Alabama, 1904 - Geology
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Page 57 - ... base of the cliff, when not removed by man, and the interglacial sands when washed by the waves on the shore show thin sheets of red garnet or black magnetite. The interglacial clay rising about 85 feet above the lake has certain well marked features. It is often well stratified in laminae running from a fraction of an inch to two or three inches in thickness, though there are a few layers three or four feet thick in which the bedding is indistinct or wanting. Where typically bedded each lamina...
Page 61 - ... always increase in cementing value after being exposed to traffic. Chert has a splintery or conchoidal fracture, and in color ranges from pure white to black, neutral grey, brown, yellow or red. It is found in the Lower Carboniferous formation and in the Knox Dolomite of the Silurian or Cambrian. In the former it is generally in more or less regular beds or sheets; in the latter, usually in the form of concretionary masses. Geographically it is found in the sub-Carboniferous and Silurian outcrops...
Page ii - Cement Resources of Alabama. Eugene A. Smith. Postage, — 29. Bulletin No. 9 ; Preliminary Report on the Artesian and Other Underground Waters of Alabama Eugene A. Smith. Postage, — 30. Index to the Mineral Resources of Alabama. EA Smith and Henry McCalley. Maps and illustrations'; 79 pages. 1904. Postage, 3 cents. These publications are mailed, free of charge; (except No. 24, price $1.00,) to Libraries and individuals who may wish to possess them ; but applicants should, in each case, forward...
Page 68 - vision cf the Lower Carboniferous, the Fort Payne Chert, the lower beds of the Knox Dolomite, and the more calcareous of the Montevallo Shales, and the rocks of the Red Mountain group. The fine red lands of the Tennessee Valley, those of parts of the great Coosa Valley, and belts in the other anticlinal valleys are of this character. 3. Highly...
Page 68 - These occupy some 2,500 square miles of areai, and are derived from the purer limestones of the Lower Carboniferous, and of the Trenton, and from the calcareous shales of the Flatwoods. The parent rocks appear along steep hillsides or else in flat, badly drained valleys, and the soils are in consequence generally too rocky or too wet for cultivation; and while essentially fertile, they are of comparative little value as farming lands. The Coastal Plain. The upland soils of the Coastal Plain, as has...
Page 6 - The limonite deposits are very numerous and are distributed over,a broad expanse of country and in many places are known to be very extensive. In some of the deposits the ore is in nearly solid mass, in others it is much scattered, and in consequence the amount of foreign material necessary to be removed for every ton of ore produced, varies very much, not only in different ore banks, but also in the different parts of the same bank. The deposits occur in nearly all the geological formations of the...
Page 67 - ... taken up and redeposited, the more complete is the separation of the clayey constituents from the sand, and the more complete is the leaching out of the soluble salts upon which in great measure the fertility is dependent. All this is illustrated in the changes to be observed in the soils as one goes from inland towards the coast. For convenience in the discussion of its soils, the State may be divided into two parts, approximately coextensive with the Mineral District and the Agricultural District,...
Page 68 - Dolomite, and of the Lower Carboniferous Limestones ; and from some of the Montevallo Shales. Naturally these soils are less fertile than the others, but on the other hand, they lie well, are easily cultivated and responsive to fertilizers. Perhaps 10,ooo square miles of the Mineral region have soils of this kind. 2. Calcareous Sandy Loams. — In these the proportion of clay and by consequence, of lime, is greater than in the preceding class ; the soils are inherently more fertile, and quite as...
Page 59 - ... on the Tennessee River. The Weisner sandstone has furnished the material for many of the handsome buildings around Anniston. Granites and Other Igneous Rocks. — While these rocks have not been much quarried in Alabama, they occur in great quantities and in position favorable for quarrying at many points in Lee, Tallapoosa, Chambers, Randolph, Elmore, Chilton, Coosa, Cleburne, and Clay counties. The granites outcrop in "flat rocks," which are low, dome-like masses of naked rock, sometimes 200...

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