Figure 3. Generalized composite stratigraphic section for the Caetano caldera and post-caldera deposits filling the caldera. Unit symbols correspond to units in Plate 1. QTs—Quaternary and late Tertiary surficial deposits and basin fill; Ts—tuffaceous sedimentary rocks, sandstone, and conglomerate, undivided; Tbm—Bates Mountain Tuff; Tad—andesite and dacite lava flows; Tcs—Post-Caetano Tuff sedimentary rocks within the Caetano caldera; Tcb—megabreccia blocks and mesobreccia lenses in Caetano Tuff; Tcu—upper unit of the Caetano Tuff; Tcl—lower unit of the Caetano Tuff; Tcc—Caetano Tuff, undivided; Tci—granite porphyry intrusions related to Caetano Tuff; Tog—older gravel and conglomerate; Pzu—Paleozoic rocks, undivided.