Excerpt from Geology of the San Diego Metropolitan Area, California Previous investigations that have been especially useful in this study include a ground water investigation by aj. Ellis a stratigraphic and paleontologic thesis of the La Jolla quadrangle by m.a. Hanna studies of the Pliocene deposits of San Diego by lg. Hertlein and us. Grant a monograph on the mineral resources of San Diego County by e.h. 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.