Northwest Basin and Range

Presented are five one-dimensional (1D) Earth resistivity models, PB-1, PB-2, CS-1, CO-1 and BR-1 that encompass several physiographic regions of the northwestern states, specifically Washington, Oregon and the southwest corner of Idaho.

The models represent a range of geologic environments, from the subducting Juan de Fuca tectonic plate along the western coast (models PB-1 and -2), across the Cascade volcanic arc (CS-1), continuing into the Columbia Plateau (CO-1) to the east, as well as the northwestern margin of the vast Basin and Range (BR-1). Subduction led to development of modern fore-arc basins (Puget Lowlands and Willamette Valley). (Fernberg et al. 2013, in prep.)