Geological Survey Bulletin 1161-D Geologic Reconnaisance of the Antelope-Ashwood Area, North-Central Oregon

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 L. Peck

Prepared in cooperation with the State of Oregon, Department of Geology ande Mineral Industries

1964

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