ISBN: 9781236331557

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 262 pages. Dimensions: 9.7in. x 7.4in. x 0.6in.This historic book may have numerous typos and missing text. Pur… Mehr…

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 262 pages. Dimensions: 9.7in. x 7.4in. x 0.6in.This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 Excerpt: . . . operated at the present time, they have produced approximately 10, 000, 000 tons of high-grade hematite. Hematites of the Filled Sinks The red hematite deposits occur chiefly in Crawford and adjoining counties in Missouri. The ore occupies old cave or sink structures that were originally filled with marcasite and pyrite. Through oxidation, these sulphides were later altered to a high-grade limestone. The orebodies vary in size and may contain from a few thousand to a million tons, the Cherryvale Valley mines having produced the latter figure. The ore usually outcrops or is found near the surface and a majority of the properties have been worked by stripping. Brown Ores Both primary and secondary limonites occur chiefly in the eastern Ozark area of Missouri and Arkansas, although minor deposits occur in the western portion of the area. Both types of ore are found in the surface clay. The secondary ore is chiefly a stalactitic ore having a pipe-like structure. It was originally deposited as sulphide but has been completely oxidized to limonite. The primary ore is frequently cherty but shows no pseudomorphs after sulphides. Bahytes Missouri is one of the chief producers of barytes in the United States and until the past 2 years averaged more than 50 per cent, of the output of the country. About 75 per cent, of the production comes from Washington County, where the mineral is found, largely embedded in the surface clay. It is associated with more or less lead ore and is frequently highly colored by iron oxide. In Jefferson County barytes occurs in the fissure veins as a gangue. In the northern Ozark area it is also found associated with both lead and zinc ores. Genesis The lead and zinc deposits of the Ozark region have been attributed by various investigators to. . . This item ships from La Vergne,TN., RareBooksClub<