Volcanic deposits, young, undifferentiated
Volcanic deposits, young, undifferentiated
Holocene to late Pleistocene
Undifferentiated young volcanic deposits occurring within and between the Long Valley caldera and Mono basins. Includes various undifferentiated, generally low-volume or locally occurring pyroclastic flow and fall deposits, lava flows, and minor (locally) cinder cones (Hildreth and Fierstein, 2016; Bailey, 1989). Compositions vary from basalt to rhyolite and include alkalic rock types (trachybasalt, basaltic trachyandesite, trachydacite) (Hildreth and Fierstein, 2016; Bailey, 1989). Includes mostly reworked part of the silicic pyroclastic apron from Mono-Inyo chain vents (map unit mic). Includes Holocene to historic age eruptive units within and adjacent to Mono Lake. Includes mafic to intermediate composition monogenetic vent field surrounding the silicic lavas and domes of Mammoth Mountain (map unit mmv).