Geologic map of the Pickett Peak quadrangle, Trinity County, California [cartographic material] / Department of the Interior, United States Geological Survey ; by W.P. Irwin [and others].
"Geology by W.P. Irwin, 1963-69, M.C. Blake, Jr., 1963, and E.W. Wolfe and C.G. Cunningham, Jr., 1967...." Include location map, index map, physiographic diagram, and text. Relief shown by contours and spot heights.
Bibliography Note
Includes bibliographical references.
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