Figure 1. Map showing mid-Cenozoic (43–19 Ma) volcanic rocks and intrusions in northern Nevada and calderas (modified from Ludington et al. [1996]) and volcano-tectonic troughs of Burke and McKee (1979). Box shows outline of Figure 2. B—Battle Mountain; BM—Bald Mountain; C—Cortez Range; CA—Clan Alpine Range calderas; CW—Cowboys Rest; D—Desatoya Mountains calderas; F—Fish Creek Mountains caldera; S—Shoshone Range; SC—Stillwater caldera complex; T—Toiyabe Range; TM—Tuscarora volcanic field; TR—Tobin Range.