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Excerpt from Mineral Resources of the Chiricahua Wilderness Area, Cochise County, Arizona The Chiricahua Wilderness encompasses about 28 square miles of the rugged central part of the Chiricahua Mountains near the southeast corner of Arizona. The Chiricahua Mountains are a fault block typical of many of the ranges in southeastern Arizona. The rocks in the wilderness are mainly weakly deformed mid-tertiary volcanic and intrusive rocks chiefly rhyolite and monzonite that lie on shale and sandstone of Cretaceous age. Paleozoic formations, such as the Permian Concha Limestone exposed 2 miles northeast of the wilderness, presumably are present locally at a depth of several thou sand feet beneath the wilderness. The Cretaceous and older rocks of the area are considerably folded and faulted, but the mid-tertiary volcanic rocks are nearly flat and have been deformed only by a few high-angle faults. Southeastern Arizona and southwestern New Mexico is a region of high mineral production. Evidence indicates, however, that the wilderness itself has very low mineral potential, inasmuch as the volcanic rocks covering most of the wilderness are younger than the major mineralization of the region, which is Late Cretaceous or early Tertiary. Furthermore, the mineralization in the Cretaceous and older rocks exposed within a few miles of the wilderness is mostly weak and at only one place, 6 miles to the north, is of modest size. Thus, although the occurrence of similar deposits beneath the thick cover of volcanic rocks is conceivable, finding such deposits would be difficult, and recovering the metals in them would not be economically attractive. 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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