Author: Lorin D. Clark

Publisher: Forgotten Books

Published: 2018-02-08

Total Pages: 32

ISBN-13: 9780656128631

Excerpt from Geology of the San Andreas 15-Minute Quadrangle, Calaveras County, California The rolling upland surface and the northwest-trend ing ridges that rise above the general level of this surface were shaped largely during Late Cretaceous and early Eocene time, when the Sierra Nevada stood much lower than at present. Steep-walled canyons dissect the upland surface in the northeast part Of the quadrangle. These canyons and the canyon of the Stanislaus River in the extreme southeast corner Of the quadrangle are younger features that result from uplift of the Sierra Nevada and more rapid erosion during later Tertiary and, probably, Quaternary time. 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.