Figure 1. Locations of the Miocene Elko, Carlin, Ivanhoe, Chimney, and adjacent sedimentary basins, shown with the light blue color, and major geographic features in northeastern Nevada. Areas with the "v" pattern are underlain by middle Miocene rhyolitic and basaltic volcanic rocks; JR—Jarbidge Rhyolite; NNR—northern Nevada rift; SR-C—Santa Rosa–Calico volcanic field. The dotted yellow lines indicate the major late Eocene gold-deposit trends; BM-E—Battle Mountain–Eureka; C—Carlin; G—Getchell; J—Jerritt Canyon. The solid red circles are the locations of middle Miocene epithermal systems that were active at the same time as the sedimentary basins; other epithermal systems beyond the limits of this study area are not shown. Abbreviated geographic locations: B—Beowawe; EH—Elko Hills; LT—Lone Tree mine; MC—Mule Canyon; MM—Marys Mountain; P—Preble mine; PH—Peko Hills; PV—Paradise Valley; R—Rain mine; TC—Twin Creeks mine. R-EH—Ruby Mountains–East Humboldt Range detachment and high-angle faults. Inset map shows the location of the study area (gray); W—Winnemucca; PF—Pine Forest Range.