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Excerpt from The Geology of the Western Buckskin Mountains, Yuma County, ArizonaType of hematite ores, whose genesis has been the subject of several recent investigations in different parts of the western United States.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art ...

Excerpt from The Geology of the Western Buckskin Mountains, Yuma County, Arizona Western Arizona is a part of that semi-arid region, the Lower Colorado Basin, one of the large physiographic provinces of the United States. To-day many of its portions remain blank upon the geologic map, and other parts are known only from reconnaissance surveys. The basement complex of granites, gneisses, porphyries, pegmatites and metamorphosed sediments is as...