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Excerpt from Fire-Flood Sequences on the San Dimas Experimental Forest The underlying rocks of the three watersheds are primarily meta morphic, consisting of several types of gneiss and some schist. Many dikes of hard igneous material such as pegmatite, dacite, and aplite have been injected through the metamorphic rocks. A large mass of granodiorite occurs in the southwest portion of watershed I. Smaller masses of quartz diorite occur in watersheds II and III. In general, both the metamorphic and granitic rocks are deeply fractured and weathered. 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.