Contributions to the Geology of Washington

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Excerpt from Contributions to the Geology of Washington: Geology and Physiography of Central Washington Central Washington includes a part of two great topographic provinces, the great plain of the Columbia and the Cascade Range. The former, in its position and general desert-like character, suggests at once a resemblance to the Great Basin of Utah and Nevada, and the vastness of the desert plain is emphasized by the snowy peaks of the Cascades along its western border. These provinces are not to be regarded as unconnected in their geologic history, however great the contrast in their general features. The intermediate zone between the great plain on the east and the mountain range on the west is a strategic point for the investigation of the geologic structure and history and the interpretation of the present topography of both provinces. On the extensive basalt-covered plain monotony wearies the traveler, while on the rocky peaks of the Cascades the complexity taxes the powers of the observer. Yakima River, an important tributary of the Columbia, drains a large area on the eastern slope of the Cascade Mountains, and in the medial portion of its course this river traverses a region which shares many of the features belonging to the two provinces mentioned above. The Mount Stuart and Ellensburg quadrangles are situated close to the geographic center of the State of \vashington and include an area of about square miles. In the southern portion of this area the country is characterized by broad valleys and low, gently sloping ridges. The general absence of forest trees and the abundance of the sagebrush are other features that remind the traveler of the great plain to the east. In the northern part of the Mount Stuart quadrangle the ridges are of a bolder type and the extremely rugged topography of Mount Stuart and other portions of the Wenatchee Mountains suggests at once the main range of the Cascades. These two quadrangles have been surveyed both topo graphically and geologically, and the results of these surveys constitute the basis of the present paper. 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.