Supplemental Material: The western Hayfork terrane: Remnants of the Middle Jurassic arc in the Klamath Mountain province, California and Oregon

Figure S1: Representative structural section of western Hayfork terrane in the Boise Saddle area, with a lower-hemisphere stereogram of poles to bedding. Figure S2: Outcrop photos of western Hayfork terrane taken along the measured section indicated in Figure 1. A. Cobble-rich lahar deposit. B. Laminated crystal-lithic arenite. Table S1: Locations and lithology of analyzed samples. Table S2: Calculated temperatures and pressures of augite and amphibole crystallization. Table S3: Major-element compositions of clinopyroxene. Table S4: Major-element compositions of amphibole. Table S5: Trace-element compositions of clinopyroxene and amphibole. Table S6: Bulk-rock compositions of the Forks of Salmon pluton.