PRELIMINARY GEOLOGIC MAP OF THE WEST HALF OF THE HAZEN QUADRANGLE, LYON AND CHURCHILL COUNTIES, NEVADA James E. Faulds and Alan R. Ramelli 2009 OPEN-FILE REPORT 09-11 PRELIMINARY GEOLOGIC MAP OF THE WEST HALF OF THE HAZEN QUADRANGLE, LYON AND CHURCHILL COUNTIES, NEVADA Prepared as part of the STATEMAP component of the National Cooperative Geologic Mapping Program in cooperation with the U.S. Geological Survey Symbology (per FGDC-STD-013-2006) NEVADA BUREAU OF MINES AND GEOLOGY Tl Qfbls Qa Qx Tb Tb Qay Tg Qsmb Tg Tbu Qsmb Tb Qsm Qx Qa Qsmb Qsmd Qsm Tby Qx Tb Tb Qfb Qsu Qsmb Tg Tsc Qsu Qa Tb Tb Tb Qe Qm Qfy Qsmd Qsm Tb Qa Tb Tb Qa Qsmb Qfy2 Qfw Qe Tb Tg Qfp Qsmb Tb Tg Tb Qfb Qfy2 Qfb Tb Tb Qfy1 Qa Qfw Qsmb Qsm Tg Tg Qfw Qfy2 Qa Qay Qe Qsp Tb Qfy1 Qfp Tb Qf Qfe Qfb Qx Qsmb Tby Qsmt Qfy1 Qf Tb Qsmt Qa Qe Tb Qfw Qay Qx Qsmb Qsmb Tg Tl Qfy Qsms Tds Qfy2 Qfy2 Tb Tb Qsu Qsms Tb Qfy2 Qfw Qay Qfy Qsu Qfy Qay Qfw Qf Tg Qfy2 Qsu Tg Qfy Qfy Tby Qfb Qfy Qfw Qess Tbu Qsmb Tb Tb Tb Qsu Qa Qsmb Qay Tb Qfp Tl Qfw Qsm Qfy1 Qsm Tb Qsu Qfb Tb Qf Tb Qay Qfw Qsm Qsms Qa Qsm Qfy Qsms Tb Qfy Qa Tg Tby Qa Qf Qfy Qm Tds Qsm Qfp Tb Qfb Tg Qfp Qfb Tg Qfy Qsm Qsmb Tb Tl Qsmd Qfw Qfy Tl Qfy Tb Qsmb Tss Tb Qfw Qemd Tbu Qf Tb Qfp Qsu Tb Tg Tb Qsmb Tb Qm Qsp Tb Qsmb Tds Qsmb Tl Qfb Qfw Qsu Tds Tby Qfp Qfy Qfy1 Tds Qsms Qfy Tb Tg Qfb Qfy1 Qfy Qf Tbcg Tb Tb Tds Tb Tb Qfw Tl Tl Qsmb Qc Tg Qfy Qfy Qsmb Qp Qsi Tds Tg Qsu Qfb Qsu Qfy Qfp Qsu Tsc Tb Qfy Qsm Qfy Qfy Qsu Qf Tl Qfb Qfy2 Qay Qfw Qa Qfy Qsmb Qsm Tds Qsu Qf Tl Qsmt Tl Tds Qfy2 Tl Qfy Qfy Qay Tg Tgdb Qx Qfp Tb Qfy Qay Qc Well Well Well Well Well 7 9 5 6 5 8 7 8 43 50 30 49 31 47 26 48 13 33 31 32 34 22 42 77 43 54 39 26 52 38 33 73 12 13 53 40 49 26 35 24 23 43 32 62 20 63 45 18 36 40 29 24 32 40 40 38 33 30 31 40 33 32 36 37 41 68 58 57 70 80 18 59 65 67 15 25 10 15 28 46 17 22 18 29 41 19 25 19 44 48 33 39 52 30 14 13 55 30 32 30 19 24 38 16 20 15 10 10 13 60 14 20 74 38 37 28 32 25 67 20 50 29 27 43 55 57 33 49 17 68 19 25 37 18 11 15 11 10 35 41 54 25 50 26 13 17 10 25 17 18 17 18 15 25 30 44 31 35 76 41 32 35 72 55 17 70 35 32 71 43 60 57 59 60 38 68 53 40 33 33 11 56 53 60 24 30 69 16 39 64 25 53 30 15 38 19 15 27 64 29 56 57 21 25 32 28 21 15 17 46 45 34 44 39 54 42 41 33 46 31 35 Well 18 3 18 000m. E 19 19 3 20 3 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 74 43 75 000m. N 75 76 76 77 77 78 78 79 79 43 80 43 80 81 81 82 82 83 83 84 84 85 85 86 86 87 87 88 Projection: Universal Transverse Mercator, Zone 11, North American Datum 1927 (m) Base map: U.S. Geological Survey Hazen 7.5' Quadrangle (1985) Field work done in 2008-2009 Supported by the U.S. Geological Survey STATEMAP Program (Agreement No. 08-HQ-AG-0053) DRAFT Preliminary geologic map Has not undergone office or field review Will be revised before publication Compilation by James E. Faulds and Alan R. Ramelli Cartography and map production in ESRI ArcGIS v9.3 (ArcGeology v1.3) by Matthew Richardson and Irene Seeley First Edition, October 2009 Printed by Nevada Bureau of Mines and Geology This map was printed on an electronic plotter directly from digital files. Dimensional calibration may vary between electronic plotters and X and Y directions on the same plotter, and paper may change size; therefore, scale and proportions may not be exact on copies of this map. For sale by: Nevada Bureau of Mines and Geology 2175 Raggio Pkwy. Reno, Nevada 89512 ph. (775) 784-6691, ext. 2 www.nbmg.unr.edu; [email protected] 2108 Scale 1:24,000 CONTOUR INTERVAL 10 METERS kilometer 0 0.5 1 mile 0 0.5 1 feet 0 1000 2000 3000 4000 5000 1 Two Tips 2 Eagle Rock 3 Soda Lake NW 4 Fernley East 5 Hazen 6 Soda Lake West 7 Silver Springs North 8 Lahontan Dam 9 Sheckler Reservoir Map location 119 o 07’ 30” W 39 o 37’ 30” N 119 o 00’ 00” W 39 o 30’ 00” N 119 o 07’ 30” W 39 o 30’ 00” N 119 o 00’ 00” W 39 o 37’ 30” N Contact Long-dashed where approximate, short-dashed where inferred, queried if identity or existence uncertain. Normal fault Long-dashed where approximate, dotted where concealed; queried if identity or existence uncertain. Showing dip; Ball on downthrown side. : ? ? Tl Tt Qf Tg Tb Tst Qx Qc Tsr Qe Qa Qp Tql Tdl Tbi Tsc Qsi Tcv Tss Qfy Qm Qfp Qfe Tyb Qfb Tds Tby Tbu Tba Tbb Qfw Qsp Qsu Qay Tsds Qsm Qfy2 Qfy1 Tdss Tbcg Tgdb Tpba Qess Qsmt Qsub Qsms Qsmg Qsmd Qsmb Qemd Qsmss Other Units Calcite veins (late Miocene) MIOCENE INTRUSIONS Colluvial deposits Mine waste (recent) QUATERNARY DEPOSITS Tephra (late Miocene) Siltstone (late Miocene) Limestone (late Miocene) Spring deposits (recent) Silicified muds and silts Quaternary Lacustrine Deposits Basaltic breccia (late Miocene) MIOCENE - EARLY PLIOCENE STRATA Anthropogenic deposits (recent) Piedmont and Hillslope Deposits Basalt intrusions (late Miocene) Basaltic andesite (late Miocene) Diatomaceous shale (late Miocene) Alluvial fan deposits (undivided) Siltstone and tuffs (late Miocene) Basaltic conglomerate (late Miocene) Middle Sehoo member (late Pleistocene) Altered yellowish basalt (late Miocene) Young alluvial fan deposits (undivided) Playa deposits (recent to late Holocene) Eetza member (late? to middle Pleistocene) Porphyritic basaltic andesite (late Miocene) Silicified diatomaceous shale (late Miocene) Young alluvial flat deposits (late Holocene) Younger aphanitic basalt lavas (late Miocene) Eolian reworked diatomite mine waste (recent) Aphanitic basalt lavas and breccia (late Miocene) Basalt-dominated alluvial fan deposits (undivided) Massive, commonly tuffaceous sandstone (late Miocene) Middle Sehoo member, tufa deposits (late Pleistocene) Middle Sehoo member, silt deposits (late Pleistocene) Upper Sehoo member, beach deposits (late Pleistocene) Young alluvial fan deposits (late to middle Holocene) Silicified ledges, commonly jasperoidal (late Miocene) Middle Sehoo member, beach deposits (late Pleistocene) Young alluvial fan deposits (middle to early Holocene) Middle Sehoo member, gravel deposits (late Pleistocene) Upper Sehoo member (early Holocene? to late Pleistocene Middle Sehoo member, silicified sands (late Pleistocene) Diatomaceous shale, limestone, and siltstone (late Miocene) Roundstone fluvial gravels (late Miocene to early Pliocene) Eetza member, silicified sands (late? to middle Pleistocene) Alluvium in recently active washes (late Holocene to historic) Diatomaceous shale and lesser sandstone, siltstone (late Miocene) Basalt lavas and lesser sedimentary rocks, undivided (late Miocene) Sandstone and lesser fluvial gravels (late Miocene to early Pliocene) Middle Sehoo member, tufa capped dendritic terrace (late Pleistocene) Eolian deposits of the Fallon alloformation (late to middle Holocene) Alluvial fan deposits of the Wyemaha alloformation (late Pleistocene) Alluvial fan deposits of the Paiute alloformation (middle to early Pleistocene) Roundstone gravels with abundant large dacite boulders (late Miocene to early Pliocene) Adjoining 7.5' quadrangle names 1 2 4 6 7 3 5 8 9 Strike-slip fault Dotted where concealed. Arrows show relative motion. $ Strike and dip of foliation in igneous rocks Inclined ¦ 33 Strike and dip of bedding Inclined o 41 Strike and dip of joints Ä Vertical Former shoreline Long-dashed where approximate. I I I I I I I I I I Spring A Tufa mound k Geothermal well Well