“…[2] Conducting new mapping and petrotectonic studies in medial belts of the Klamath Mountains and the southern Sierran Foothills, and building on the contributions of many earlier workers, Ernst et al [2008] proposed a plate tectonic scenario that described important aspects of the mid-Paleozoic -Mesozoic crustal growth of northern California. Through Middle Jurassic time, largely oceanic terranes that formed seaward and ultimately were assembled in the Klamaths and the Sierran Foothills, consist chiefly of intensely imbricated mafic-ultramafic complexes and superjacent, fine-grained terrigenous strata derived from previously accreted continental margin belts [e.g., Burchfiel and Davis, 1981;Wright, 1982;Dickinson, 2008;Ingersoll, 2008]. Although commonly regarded as products of convergent plate tectonic processes, sutured ophiolite + chertargillite terranes apparently reflect $230 Myr of dominantly margin-parallel slip, involving minor stages of transtension and transpression [Saleeby, 1981[Saleeby, , 1982[Saleeby, , 1983Silberling et al, 1987;Irwin, 2003;Ernst et al, 2008].…”