Polydiexodina oregonensis n. sp., of late Guadalupe (late Permian) age is described from a float boulder in central Oregon. The boulder apparently came from nearby beds of boulder conglomerate of late Triassic age, of which most of the boulders contain the fusulinid fauna of the Coyote Butte Formation of Leonard (late early Permian) age. Uplift in the area during late Triassic time and removal of rocks of late Guadalupe age and a considerable thickness of beds of Leonard age are suggested.

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