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Geologic Reconnaissance of the Antelope-Ashwood Area
North-central Oregon, with Emphasis on the John Day Formation of Late Oligocene and Early Miocene Age
by Dallas Lynn Peck, David L. Durham, George Leonard Snyder, Israel Gregory Sohn, John Calvin Reed (Jr.), Marion Joseph Bergin, Mortimer Hay Staatz, Ronald Willden, William Jameson Mapel, Wayne A. Chisholm, Richard Edwards Bergenback ยท 1963
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Page count: 59
A description of the rocks and structural features of an area containing some major copper deposits of southeastern Arizona.