Bedrock Geologic Map of Yosemite Valley, Yosemite National Park, California
: I / DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY L, BEDROCK GEOLOGIC MAP OF YOSEMITE VALLEY, YOSEMITE NATIONAL PARK, CALIFORNIA By Frank C. Calkins and others MISCELLANEOUS N,IVESTIGATONS SERIES Published by the U.S. Geological Survey, 1985 G DEPARTMENT OF THE INTERIOR TO ACCOMPAI{Y MAP I-1639 U.S, GEOLOGICAL SURVEY BEDROCK GEOLOGY OF THE YOSEMITE VALLEY AREA YOSEMITE NATIONAL PARK, CALIFORNIA Prepared by N. King Huber and Julte A. Roller From the wrttlngs of Frank C. Calklns and other sources PREFACE INTRODUCTION Frank Calkins' work in Yosemite was preceded by Yosemite Valley, one of the world's great natural works Henry W. Tumer, also of the U.S. Geological Survey, of rock sculpfure, is carved into the west slope of the who began mapping the Yosemite and Mount Lyell 30- Siena Nevada. Immense cliffs, domes, and waterfalls minute quadrangles in 1897 and laid the foundation that tower over forest, meadows, and a meandering river, Calkins' work was built on. Although Tumer never creating one of the most scenic nafural landscapes in completed this sizable assignment, he recognized the North America (fig. 1). In Yosemite Valley and the differing types oI plutonic rocks and, for example, named adloining uplands, the forces of erosion have exposed, the El Capitan Granite. with exceptional clarity, a highly complex assemblage of Calkins mapped the valley and adjacent areas of granitic rocks. The accompanying geologc map shows the Yosemite National Park during the period 1913 through distibution of some of the different rocks that make up 1916, at the same time that Francois Matthes was this assemblage.
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