Geologic map of the Mitchell Butte quadrangle, Oregon [cartographic material] / geology by R.E. Corcoran ... [et al.].
Relief shown by contours and spot heights. "Contour interval 50 feet." "Based upon the Mitchell Butte topographic map issued by the U.S. Geological Survey, 1906." Includes text, table "Significant oil and gas tests in the Mitchell Butte quadrangle," 5 generalized geologic sections, declination diagram, and index map on front panel. Text continues on verso.
- State of Oregon Dept. of Geology and Mineral Industries
- Held by
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