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Excerpt from Geology of Western Ore Deposits The first and most ancient rock series, which underlies all others, and may be called the bedrock of the world, is the granitic. This is commonly assumed to be of Archean age, or to have been formed and up heaved in the earliest period of the world's existence of which we have any cognizance. This is doubtless true in the majority of cases, but there is evidence that some granites, such as those of Pike's Peak and the Cripple Creek region, were upheaved or erupted at a later date. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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