A Miocene mammalian fauna from Sucker Creek, southeastern Oregon

Abstract

Sediments occurring along the lower course of Sucker Creek, in eastern Malheur County, Oregon, have been correlated with the Payette formation of southwestern Idaho on the basis of fossil plant remains found in them. A fossil mammalian fauna, collected from the Sucker Creek beds by field parties of the California Institute, now makes possible a clearer understanding of the relationships between the Miocene mammalian stages found in the northern Great Basin Province and the Payette stage of southwestern Idaho. Because of its incompleteness, the Payette mammalian assemblage up to the present time has furnished no thoroughly satisfactory basis for comparison with similar faunas occurring farther to the west.