Scientific Investigations Map 3040 U.S. Department of the Interior Sheet 2 of 2 U.S. Geological Survey Pamphlet accompanies map CORRELATION OF MAP UNITS LIST OF MAP UNITS SURFICIAL DEPOSITS [Some unit exposures on the printed or plotted map are too small to distinguish the color for unit identification. MADE LAND, These units are labeled where possible, and unlabeled units are attributed in the data base.] HILLSLOPE, AND PLAYA, PALUDAL, AND EOLIAN GROUNDWATER AND ALLUVIAL DEPOSITS MASS-WASTING VOLCANIC AND OLDER LACUSTRINE DEPOSITS DEPOSITS SPRING DEPOSITS GEOMORPHIC FEATURES DEPOSITS SEDIMENTARY ROCKS SURFICIAL DEPOSITS Qav Qaw Qasl Qsm Qaed Qae Qsgp ml GROUNDWATER AND SPRING DEPOSITS ALLUVIAL DEPOSITS Qaa QaaeQaae Qag Qags Qagw Qaa1 Qapf Qap Qsgp Qaps Holocene Qaw Active wash deposit (Hol ocene) Sag pond (Holocene) Qav Active valley-axis deposit (Hol oc( ene) Active groundwater discharge deposit (Holocene) Qya Qyw Qysl Qyp Qye Qapd Qag Qygw Qyao Qyae Qyb Qyl Qc Qaa Active alluvial fan deposit (Hol oc ene) Qags Spring mound deposits (H olocene) Qyaoe Qaae Active alluvial fan deposit (H ol ocene) Qagw Wetland deposits (Holocene) Qls Holocene and Late Pleistocene QauQau Coso Range Qaa1 Active alluvial fan deposit (Holoc ene) Qygw Young groundwater discharge deposit (Holocene and latest Pleistocene) Qia Qiw Qibg Qit Qiae Qigw Qash Qil QUATERNARY Qyw Young wash deposit (Hol ocene and late Pleistocene) Qigw Intermediate gr oundwater discharge deposit (late to middle Pleistocene) Qiao Qya Young alluvial fan deposit (Holoc ene and late Pleistocene) Qogw Old gr oundwater discharge deposit (middle Pleistocene or older) Qoa Qol Qoae Qogw Qoc Pleistocene Qyao Young alluvial fan deposit (Holoc ene and late Pleistocene) Qb Qvu Qiw Intermediate wash deposit (late to middle Pleistocene) MADE LAND, HILLSLOPE, AND MASS WASTING DEPOSITS ff ve Qia Intermediate all uvial fan deposit (late to middle Pleistocene) QToa Qiao Intermediate all uvial fan deposit, older (late to middle Pleistocene) m l Made land (Recent) Tvpd Tcpd Tbpd KJpd MzPzpd QTsbk QTbc QTb QTs Colluvial deposits (Holocene and Pleistocene) Tves Tbes Qoa Old alluvial fan deposit (mi ddle to early Pleistocene) Q c Pleistocene(?) Pliocene and (or) (or) and Pliocene Tblag Qau Alluvial fan deposit und ifferentiated (Quate rnary) Qls Mass-movement deposits (Holocene and Pleistocene) QUATERNARY (?) QUATERNARY AND TERTIARY QToa Extremely old alluvial fan deposit (early P leistocene to Pliocene) Qoc Older colluvial deposits (Pleistocene ?) Panamint and Tcgl Argus Range Block slide deposits (Pleistocene and or late Pliocene) QTs Sedimentary rocks (ear ly Pleistocene and (or) late Pliocene) QTsbk Tvd Tcs Tcv Tvrc Ts Tcu Tca PLAYA, PALUDAL, AND LACUSTRINE DEPOSITS VOLCANIC AND OLDER SEDIMENTARY ROCKS Tb Tvdo Pliocene Tcla Qash Volcanic ash (Quaternary) Qasl Active saline lake deposit (Holocene) Tb Tbc Tb Basalt and other mafic volcanic rocks (mainly Quaternary) Qsm Active saline marsh depos it (Holocene) Qb Tcvr Tvcf Trb TERTIARY Tsa Es Qap Active playa deposit (Holocene) Qvu Volcanic rocks (Quat ernary) Tv Qaps Active playa deposit (Holocene), sand y facies QTbc Volcanic center, basalt and other mafic volcanic rocks (Quaternary and Kgu Late Miocene(?) and (or) Pliocene or late Pliocene) Bedrock Qapf Active playa deposit (Holocene), mixed eolian, lacustrine, playa, alluvial Young playa deposit (Holocene and late Pleistocene) QTb Basalt and other mafic volcanic rocks (Quaternary and or late Pliocene) KJg Mesozoic Qyp Qysl Playa fringe saline facies (Holocene and late Pleistocene) Tcgl Conglomerate (Pliocene ?) Paleozoic and MzPz Mesozoic Qyb Young lacustrine beach deposit (Holocene to late Pleistocene) Ts Sedimentary Rocks (Plioc ene) Precambrian, ca Paleozoic and Mesozoic PRE-TERTIARY Qyl Young lacustrine deposit (Holocene to late Pleistocene) Map showing areas of published maps in the Darwin Hills 30 x 60 minute Figure 1. Coso Formation (Pliocene)—Divided informally into : quadrangle and full extent of map area Qibg Intermediate lacustrine beach deposit (late to middle Pleistocene) o 118 00' o o 117 00' 36 30' Rhyodacite (Pliocene) Qit Intermediate nearshore tufa deposit (late to middle Pleistocene) Tvd STONE AND OTHERS Tcs Mainly sedimentary rocks (Plioc ene) (1989) Q il Intermediate lacustrine and deltaic deposits (late to middle Pleistocene) Intermediate lacustrine, wetlands and playa deposits (late(?) Tcu Coso Formation, undifferentiated (Pliocene) Qol or middle early Pleistocene) STINSON HALL AND HALL Coso Formation, undifferentiated volcanic rocks (Pliocene) (1977b) MACKEVITT (1971) Tcv (1962) Tvrc Red weathering rhyodacitic volcanic rock (Pliocene ) EOLIAN DEPOSITS Mainly volcanic ash and tephra (Plioce n e) EXPLANATION Tca Contact--Dashed where inferred, dotted where concealed Qae Active eolian dune deposit (Holocene) Tcla Lower volcanic ash and tephra (Plioce n e) Fault--Dashed where inferred, dotted where concealed @ Fault--Concealed, queried Qaed Active eolian dune deposit (Holoc ene) @ @ Fault--inferred, queried Young eolian deposit (Holocene and latest Pleistocene) Tvdo Older dacitic volcanic rock (Pliocene) Normal fault--Dashed where inferred, dotted where concealed Qye STINSON Strike slip fault--Dashed where inferred, dotted where concealed ALBEE AND OTHERS Qyae Young mixed alluvial and eolian deposit (Holocene and latest Pleistocene) Tb Mainly flood-like basalt flows and other mafic volcanic rocks (Pliocene) 4 4 4 Attenuation fault--Dashed where inferred (1977a) (1981) M M Syncline Qyaoe Young mixed alluvial and eolian deposit (Holoce n e and latest Pleistocene) Tbc Eruptive centers for basalt flows and other mafic volcanic rocks (Pliocene) Anticline DUFFIELD AND BACON F Monocline (1981) Qiae Intermediate alluvial and mixed eolian deposit (late to middle Pleistocene) Tcvr Volcanic ash flow and ash (early Pliocene and (or) late Miocene) Scarp Landslide headscarp Qoae Volcanic ash flow and ash(early Pliocene and (or) late Miocene) o Old mixed alluvial and eolian deposit (late to middle Pleistocene) Tvcf 36 00' Shoreline Darwin Hills 1:100,000-scale map area REHEIS (1991) Surface Trb Sedimentary rocks (early Pliocene and (or) late Miocene) Fluvial terrace riser Tsa Sedimentary rocks (late Miocene ?) 118o 00' 117o 00' 36o 30' Tv Volcanic rock (early Pliocene to late middle Miocene) Hunter Mtn Fault Lee Flat Fault Owens Lee GEOMORPHIC FEATURES Panamint Range Dry Lake Flat Rainbow Canyon rollover Owens Valley Fault Sierra Nevada Frontal Fault zone Qapd Pediment surfaces (middle and late Quaternary) Malpais Faceted bedrock spur (Pleistocene and (or) late Pliocene) Santa Panamint ff Centennial Flat Fault Mesa ve Volcanic vent area (Quaternary and (or) late Pliocene) Rosa Valley Townes Pass Fault Flat Panamint Fault Zone Tvpd Pediment inset onto (Quaternary and (or) late Pliocene) Mesa Fault Tcpd Pediment inset onto Coso Formation (Quaternary and (or) late Pliocene) Owens Valley Fault Darwin Plateau Tbpd Pediment inset onto basalt (Quaternary and (or) late Pliocene) Centennial Flat Fault KJpd Pediment developed on granitic substrate (Quaternary and (or) late Lower Ash Hill Fault Pliocene) Darwin Wash Red Hill rollover Centennial MzPzpd Pediment developed on Paleozoic and (or) Mesozoic substrate (Quaternary Red Hill Fault Zone Flat and (or) late Pliocene) Emigrant Flat Detachment Tves Pediment developed on Tv (Quaternary and (or) late Pliocene) Joshua Panamint Range Darwin Flat Tbes Old erosion surface developed on top of basalt (early or middle Pliocene) Plateau Emigrant Flat Detachemt Es Old erosion surface on bedrock (late Miocene and early Pliocene) Centennial Flat Fault Tblag Cobble lag deposit (late Miocene and early Pliocene) Panamint Fault Zone Fault Zone Kgu Old relief above Es (late Miocene and early Pliocene) Darwin Coso Ash Hill Fault BEDROCK LITHOLOGIES Peak Wash Cactus Argus Range Sierra Flat KJg Plutonic rocks (Cretaceous and (or) Jurassic) Nevada Sedimentary and metamorphic rocks Haiwee rollover Coles Panamint MzPz Petroglyphs Canyon Fault Zone Cactus Flat Fault Flat Valley Meta-sedimentary, Metamorphic, and Plutonic Rocks of the Panamint ca Range (Mesozoic, Paleozoic, and Precambrian) Argus RangeBendire Canyon Upper rollover Panamint Range Etcharren Fault Cactus Sierra Nevada Frontal Fault Rose Valley Fault Flat Coso Wash Fault Fault--Plio-Pleistocene and/or Late Miocene Rose Etcharren Highlight indicating Shepherd probable Late Pleistocene Valley Valley and/or active faults 36o 00' Canyon Index map showing geologic and geographic localities of the Darwin Hills 30' x 60' quadrangle, Inyo County, California Any use of trade, firm, or product names in this publication is for descriptive purposes only and does not Surficial Geologic Map of the Darwin Hills 30' X 60' Quadrangle imply endorsement by the U.S. Government. This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary Inyo County, California between electronic plotters and between X and Ydirections on the same plotter, and paper may change size due to atmospheric conditions; therefore, scale and proportions may not be true on plots of this map. By For sale by U.S. Geological Survey, Information Services, Box 25286,Federal Center, Denver, CO 80225, A. S. Jayko 1-888-ASK-USGS Digital files available at http://pubs.usgs.gov/sim/30 40 2009.