Polyphase brittle and ductile deformation of Late Jurassic ophiolitic basalt-argillite matrix mélange and stratigraphic overlap sequence, northwestern Washington State

A belt of Jurassic to Cretaceous ophiolitic rocks borders the western margin of the U.S. Cordillera and stretches from central California to northwestern Washington State. The northern end of this belt lies between the San Juan Islands and the Northwest Cascades. Within this region, ophiolitic rocks consist of a succession of oceanic and arc-affinity igneous and sedimentary rocks which form a sedimentary melange and sedimentary overlap sequence...