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Pleistocene
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Author
Oregon. Dept. of Geology and Mineral Industries
Remove constraint Author: Oregon. Dept. of Geology and Mineral Industries
Author
Walker, George Walton, 1921-
Remove constraint Author: Walker, George Walton, 1921-
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1. [Article] The Ore bin ; Vol. 32 No. 6 (June 1970)
Periodic violent eruptions from many different centers during Cenozoic time deposited vast quantities of pyroclastic material as ash-flow tuffs over most of Oregon, although the Coast Ranges and isolated ...Citation