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Pleistocene
Remove constraint Pleistocene
Subject
Thematic Classification -- Geography and Geology -- Geology
Remove constraint Subject: Thematic Classification -- Geography and Geology -- Geology
Subject
Geology, Stratigraphic -- Cenozoic
Remove constraint Subject: Geology, Stratigraphic -- Cenozoic
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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