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Geology of the southernmost Deschutes basin, Tumalo quadrangle, Deschutes County, Oregon

Creator:

McDannel, Angela K.

Abstract:

The Tumalo quadrangle lies approximately 30 kilometers behind the Cascade volcanic arc and marks the southernmost extent of continuously exposed Deschutes Formation rocks. Deschutes Formation rocks in the Tumalo quadrangle include late Miocene volcaniclastic sedimentary rocks, ignimbrites and lapillistones, and late Miocene to early Pliocene basalts and basaltic andesites. Volcaniclastic...

Resource Type:

Masters Thesis