Download or read book A Preliminary Report on the Artesian-Well System of Georgia Volume 7 written by Samuel Washington McCallie and published by Rarebooksclub.com. This book was released on 2013-09 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 edition. Excerpt: ...polished enameled surfaces. The particles consist largely of calcium phosphate, and are probably of coprolitic origin.1 140 "--Dark-gray clay, similar to the clays found at the 50-and 100-foot levels. 145 "--Gray, sandy clay. When closely examined, the clay is seen to contain many fragments of feldspar, and dark, rounded particles, probably coprolitic. 160 "--Fine, dark-gray, sandy clay, with fragments of feldspar and coprolitic particles. 185 "--Very coarse, white sand. The grains are well rounded, and often partially coated with a thin coating of iron oxide. Coprolitic particles are present. 215 "--Dark-gray marl, of greenish tint, made up largely of microscopic crystals of calcite. 217 "--Medium fine-grained, water-worn sand, containing fully 5 per cent. of dark coprolitic material, and numerous fragments of bones, which appear to be ribs of small fishes. There also occur, in the sand, tiny pieces of reddishbrown mineral, which are probably fragments of garnets. See description, p. 77. 226 feet--Hard, flinty, drab-colored claystone, containing thin seams of sandstone. 228 "--Drab-colored, calcareous, sandy clay, with fragments of flint and limestone, which seem to form thin beds, or layers, in the sand. 230 "--Hard, vitreous sandstone, having many coprolitic particles, highly phosphatic. The sand grains are all well-rounded, and are firmly cemented by opalized silica. 232 "--Gray, coprolitic marl. 234 "--Fine, dark-gray sand, with fragments of shells and flakes of mica. 236 "--Light-blue, compact clay, having small, sharp granules of quartz and feldspar, and minute scales of mica. 275 "--Gray, sandy marl, containing a few large, waterworn quartz grains and coprolitic...