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Mineral Resources > Online Spatial Data > Geology > by state > Nevada Geology

Geologic units in Nye county, Nevada

[Additional scientific data in this geographic area]

Older basalt rocks (Early Oligocene to Early Miocene) at surface, covers < 0.1 % of this area

OLDER BASALT ROCKS

Lithology: basalt; andesite

Granitic rocks (Middle Triassic to Early Jurassic) at surface, covers < 0.1 % of this area

GRANITIC ROCKS-Quartz monzonite in northern Esmeralda County

Lithology: granite; granodiorite; quartz monzodiorite

Limestone, dolomite, shale, and quartzite (Ordovician) at surface, covers 1 % of this area

LIMESTONE, DOLOMITE, SHALE, AND QUARTZITE-Includes units such as Pogonip Group, Eureka Quartzite, and Ely Springs Dolomite. Where Ely Springs Dolomite or equivalent rocks are included in SOc unit, this unit includes only the Pogonip Group and Eureka Quartzite or their equivalents.

Lithology: limestone; dolostone (dolomite); shale; quartzite; chert

Koipato Group and related rocks (Permian to Early Triassic) at surface, covers < 0.1 % of this area

KOIPATO GROUP AND RELATED ROCKS (Lower Triassic)-Altered andesitic flows, rhyolitic tuffs and flows, and clastic rocks. Includes rocks mapped by Silberling (1959) as Pablo Formation and originally considered to be Permian in the Shoshone Mountains, Nye County. Includes Tallman Fanglomerate (Permian?) in Humboldt County

Lithology: rhyolite; andesite; clastic; basalt

Breccia (Middle Eocene to Early Pliocene) at surface, covers < 0.1 % of this area

BRECCIA-Volcanic, thrust, and jasperoid breccia and landslide megabreccia

Lithology: volcanic breccia (agglomerate); tectonite; landslide

Dolomite, limestone, and minor amounts of sandstone and quartzite (Devonian) at surface, covers 1 % of this area

DOLOMITE, LIMESTONE, AND MINOR AMOUNTS OF SANDSTONE AND QUARTZITE-Includes units such as Sevy and Simonson Dolomites, Guilmette and Nevada Formations, and Devils Gate Limestone.

Lithology: dolostone (dolomite); limestone; sandstone; quartzite; conglomerate; shale; chert

Andesite and basalt flows (Early Miocene to Early Pliocene) at surface, covers 1.0 % of this area

ANDESITE AND BASALT FLOWS-Mostly in about 17 to about 6 m.y. age range. In Humboldt County, locally includes rocks as old as 21 m.y. May include rocks younger than 6 m.y. in places

Lithology: basalt; andesite; shoshonite

Siltstone, sandstone, limestone, and dolomite (commonly silty or sandy) and gypsum (Early Permian) at surface, covers < 0.1 % of this area

SILTSTONE, SANDSTONE, LIMESTONE, AND DOLOMITE (COMMONLY SILTY OR SANDY), AND GYPSUM (Lower Permian)-Includes units such as Rib Hill Sandstone and Pequop Formation of Steele (1959) in Elko County, Rib Hill Sandstone and Arcturus Formation in White Pine County, Queantoweap Sandstone of NcNair (1951), Hermit Shale, and Coconino Sandstone in Clark and southern Lincoln Counties.

Lithology: sandstone; limestone; shale; siltstone; dolostone (dolomite); evaporite (gypsum); chert; quartzite

Older alluvial deposits (Miocene to Quaternary) at surface, covers < 0.1 % of this area

OLDER ALLUVIAL DEPOSITS

Lithology: alluvium; lake or marine deposit (non-glacial)

Massive limestone (Mississippian) at surface, covers < 0.1 % of this area

MASSIVE LIMESTONE-In the San Antonio Mountains, western Nye County

Lithology: limestone; conglomerate; sandstone; argillite

Rhyolitic flows and shallow intrusive rocks (Late Eocene to Middle Eocene) at surface, covers 0.2 % of this area

RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS

Lithology: rhyolite; dacite; trachyte

Limestone (Pennsylvanian) at surface, covers 0.1 % of this area

LIMESTONE-Includes Ely Limestone (mostly Lower and Middle Pennsylvanian)

Lithology: limestone; chert

Havallah sequence of Silberling and Roberts (1962) (Mississippian to Permian) at surface, covers 0.3 % of this area

HAVALLAH SEQUENCE OF SILBERLING AND ROBERTS (1962)-Chert, argillite, shale, greenstone, and minor amounts of siltstone, sandstone, conglomerate, and limestone. Includes Schoonover Formation of Fagan (1962) and Reservation Hill Formation in Elko County, Farrel Canyon Formation in southwestern Humboldt County, Havallah and Pumpernickel Formations in Pershing, Lander, and parts of Humboldt Counties, and rocks originally considered a part of the Pablo and Excelsior Formations in northern Nye, northern Esmeralda, and southern Mineral Counties. Assignment of some rocks to the Havallah sequence in the East Range, Pershing County, is highly uncertain. Includes rocks ranging in age from Late Mississippian to Early Permian

Lithology: shale; metavolcanic rock; chert; siltstone; sandstone; conglomerate; limestone

Serpentinite (Late Devonian to Early Triassic) at surface, covers < 0.1 % of this area

SERPENTINITE (Paleozoic)-Mineral, northwestern Nye, and eastern Humboldt counties

Lithology: serpentinite

Slaven Chert (Devonian) at surface, covers < 0.1 % of this area

SLAVEN CHERT-Chert and sparse limy sandstone, siltstone, and limestone. Lander County

Lithology: chert; shale; siltstone; sandstone; limestone

Granitic rocks, western Nevada (Jurassic to Cretaceous) at surface, covers < 0.1 % of this area

GRANITIC ROCKS, WESTERN NEVADA (Mesozoic)-Mostly quartz monzonite and granodiorite. Inconclusively dated or not dated radiometrically

Lithology: granodiorite; quartz monzonite; granite; quartz diorite; gabbro

Shale, siltstone, sandstone, chert-pebble conglomerate, and limestone (Devonian to Mississippian) at surface, covers 0.8 % of this area

SHALE, SILTSTONE, SANDSTONE, CHERT-PEBBLE CONGLOMERATE, AND LIMESTONE-Includes units such as Pilot Shale, Joana Limestone, Chainman Shale, and Diamond Peak Formation in northern and eastern Nevada and Narrow Canyon Limestone, Mercury Limestone, and Eleana Formation in southern Nevada

Lithology: shale; limestone; siltstone; sandstone; conglomerate; dolostone (dolomite); chert; quartzite

Shale, chert, and minor amounts of quartzite, greenstone, and limestone (Ordovician) at surface, covers 0.3 % of this area

SHALE, CHERT, AND MINOR AMOUNTS OF QUARTZITE, GREENSTONE, AND LIMESTONE-Includes units such as Vinini Formation of north-central Nevada, Palmetto Formation in southern and central parts of Esmeralda County, and Comus Formation in Humboldt County. Locally includes rocks of Silurian and Devonian age.

Lithology: chert; shale; limestone; quartzite; andesite; siltstone; sandstone; chemical; greenstone; dolostone (dolomite)

Playa, marsh, and alluvial-flat deposits, locally eroded (Quaternary) at surface, covers 2 % of this area

PLAYA, MARSH, AND ALLUVIAL-FLAT DEPOSITS, LOCALLY ERODED

Lithology: playa; alluvium

Ash-flow tuffs and tuffaceous sedimentary rocks (Middle Miocene to Late Miocene) at surface, covers 0.3 % of this area

ASH-FLOW TUFFS AND TUFFACEOUS SEDIMENTARY ROCKS

Lithology: ash-flow tuff; rhyolite; sandstone; dacite; trachyte

Devonian marine rocks, unit 1 (Death Valley) (Middle to Late Devonian) at surface, covers < 0.1 % of this area

Limestone and dolomite, sandstone and shale; in part tuffaceous

Lithology: limestone; dolostone (dolomite); sandstone; marble; quartzite

Diorite (Jurassic to Cretaceous) at surface, covers < 0.1 % of this area

Lithology: diorite; quartz diorite; gabbro; granite; granodiorite; serpentinite

Rhyolitic flows and shallow intrusive rocks (Middle Miocene to Late Miocene) at surface, covers 2 % of this area

RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS

Lithology: rhyolite; dacite; trachyte

Alluvial deposits (Quaternary) at surface, covers 54 % of this area

ALLUVIAL DEPOSITS-Locally includes beach and sand dune deposits

Lithology: alluvium; mass wasting; dune sand; lake or marine deposit (non-glacial)

Tertiary nonmarine rocks, undivided (Paleocene to Pliocene) at surface, covers < 0.1 % of this area

Undivided Tertiary sandstone, shale, conglomerate, breccia, and ancient lake deposits.

Lithology: conglomerate; sandstone; sedimentary breccia; volcanic rock (aphanitic); mudstone; limestone; siltstone

Rhyolitic intrusive rocks (Eocene to Miocene) at surface, covers 0.3 % of this area

RHYOLITIC INTRUSIVE ROCKS

Lithology: granitoid

Granitic rocks (Jurassic) at surface, covers < 0.1 % of this area

GRANITIC ROCKS-Mostly quartz monzonite and granodiorite

Lithology: quartz monzonite; granodiorite; granite; monzonite; quartz diorite; peraluminous granite

Limestone, minor amounts of dolomite, shale, and sandstone; locally thick conglomerate units (Triassic) at surface, covers 0.3 % of this area

LIMESTONE, MINOR AMOUNTS OF DOLOMITE, SHALE, AND SANDSTONE; LOCALLY THICK CONGLOMERATE UNITS (Lower, Middle, and Upper Triassic)-Includes Tobin, Dixie Valley, Favret, Augusta Mountain, and Cane Spring Formations and Star Peak Group in central Nevada and Grantsville and Luning Formations in west-central Nevada

Lithology: limestone; dolostone (dolomite); shale; sandstone; conglomerate; siltstone; andesite; chert

Welded and nonwelded silicic ash-flow tuffs (Early Oligocene to Early Miocene) at surface, covers 17 % of this area

WELDED AND NONWELDED SILICIC ASH-FLOW TUFFS-Locally includes thin units of air-fall tuff and sedimentary rock

Lithology: rhyolite; dacite; trachyte

Dolomite (Silurian to Early Devonian) at surface, covers 0.3 % of this area

DOLOMITE-Includes units such as Laketown and Lone Mountain Dolomites. Locally includes rocks of Early Devonian age at top.

Lithology: dolostone (dolomite); limestone; chert; sedimentary breccia

Cherty limestone and sparse dolomite, shale, and sandstone (Permian) at surface, covers < 0.1 % of this area

CHERTY LIMESTONE AND SPARSE DOLOMITE, SHALE, AND SANDSTONE (Lower and Upper Permian)-Includes units such as Park City Group and equivalent rocks in northern Nevada and Toroweap Formation and Kaibab Limestone in southern Nevada

Lithology: limestone; shale; dolostone (dolomite); sandstone; siltstone; chert; conglomerate; phosphorite; evaporite

Ash-flow tuffs, rhyolitic flows, and shallow intrusive rocks (Middle Miocene to Late Miocene) at surface, covers < 0.1 % of this area

ASH-FLOW TUFFS, RHYOLITIC FLOWS, AND SHALLOW INTRUSIVE ROCKS

Lithology: rhyolite; dacite; trachyte

Horse Spring Formation (Late Oligocene to Middle Miocene) at surface, covers < 0.1 % of this area

HORSE SPRING FORMATION-Tuffaceous sedimentary rocks, southern Nevada

Lithology: limestone; sandstone; dolostone (dolomite); mudstone; siltstone; evaporite; tuff; lava flow; felsic volcanic rock; intermediate volcanic rock; mafic volcanic rock

Quartzite and minor amounts of conglomerate, phyllitic siltstone, limestone, and dolomite (Late Proterozoic to Early Cambrian) at surface, covers 0.9 % of this area

QUARTZITE AND MINOR AMOUNTS OF CONGLOMERATE, PHYLLITIC SILTSTONE, LIMESTONE, AND DOLOMITE-Includes Prospect Mountain Quartzite, Osgood Mountain Quartzite, and Gold Hill Formation in northern Nevada, and Stirling Quartzite, Wood Canyon Formation, and Zabriskie Quartzite in southern Nevada.

Lithology: quartzite; siltstone; dolostone (dolomite); limestone; phyllite; shale; conglomerate; sandstone

Basalt flows (Late Miocene to Middle Miocene) at surface, covers 0.3 % of this area

BASALT FLOWS

Lithology: basalt

Sandy and silty limestone, conglomerate, and siltstone (Pennsylvanian to Late Permian) at surface, covers < 0.1 % of this area

SANDY AND SILTY LIMESTONE, CONGLOMERATE, AND SILTSTONE (Upper Pennsylvanian to Upper Permian)-Includes units such as Strathearn Formation of Dott (1955) and Buckskin Mountain, Beacon Flat, and Carlin Canyon Formations of Dott (1955)

Lithology: limestone; conglomerate; siltstone; sandstone; chert

Shale and thin-bedded or laminated limestone; also thinly interbedded limestone and chert (Middle Cambrian to Late Cambrian) at surface, covers < 0.1 % of this area

SHALE AND THIN-BEDDED OR LAMINATED LIMESTONE; ALSO THINLY INTERBEDDED LIMESTONE AND CHERT-Includes units such as Preble and Emigrant Formations

Lithology: shale; limestone; chert; siltstone; quartzite; diorite; conglomerate

Granitic rocks, central and eastern Nevada (Jurassic to Miocene) at surface, covers < 0.1 % of this area

GRANITIC ROCKS, CENTRAL AND EASTERN NEVADA-Mostly quartz monzonite and granodiorite. Inconclusively dated or not dated radiometrically

Lithology: quartz monzonite; granodiorite; granite; peraluminous granite

Antler Sequence of Silberling and Roberts (1962) (Pennsylvanian to Late Permian ) at surface, covers < 0.1 % of this area

ANTLER SEQUENCE OF SILBERLING AND ROBERTS (1962) (Middle Pennsylvanian to Early or Late Permian) (Guadalupian)-Conglomerate, sandy to conglomeratic limestone, limestone, sandstone, and calcareous shale. Thin detrital and carbonate sequence within main part of Antler orogenic belt. Includes units such as Sunflower Formation of Bushnell (1967) in Elko County, Battle Formation, Antler Peak Limestone, and Edna Mountain Formation in Lander and western Eureka Counties, and Wildcat Peak Formation in northern Nye County

Lithology: conglomerate; limestone; sandstone; siltstone; shale

Andesite and related rocks of intermediate composition (Early Oligocene to Early Miocene) at surface, covers 2 % of this area

ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION-Flows and breccias

Lithology: andesite; trachyte; dacite

Welded and nonwelded silicic ash-flow tuffs (Middle Miocene to Late Miocene) at surface, covers 6 % of this area

WELDED AND NONWELDED SILICIC ASH-FLOW TUFFS-Locally includes thin units of air-fall tuff and sedimentary rock

Lithology: rhyolite

Granitic rocks (Cretaceous) at surface, covers 0.7 % of this area

GRANITIC ROCKS-Mostly quartz monzonite and granodiorite

Lithology: granodiorite; quartz monzonite; granite; peraluminous granite

Limestone and minor amounts of dolomite and shale (Mississippian) at surface, covers < 0.1 % of this area

LIMESTONE AND MINOR AMOUNTS OF DOLOMITE AND SHALE-Includes units such as Rogers Spring and Monte Cristo Limestones

Lithology: limestone; dolostone (dolomite); chert; shale; sandstone

Dunlap Formation (Early Jurassic to Middle Jurassic) at surface, covers < 0.1 % of this area

DUNLAP FORMATION (Lower and Middle Jurassic)-Conglomerate, sandstone, greenstone, felsite, and tuff. Locally contemporaneous with folding and thrusting. Mineral County and adjacent parts of Esmeralda and Nye Counties

Lithology: sandstone; conglomerate; volcanic rock (aphanitic); limestone; siltstone; shale

Intrusive rocks of mafic to intermediate composition (Eocene to Miocene) at surface, covers < 0.1 % of this area

INTRUSIVE ROCKS OF MAFIC TO INTERMEDIATE COMPOSITION

Lithology: diorite; monzodiorite; quartz diorite; quartz monzogabbro; tonalite; gabbro

Rhyolitic flows and shallow intrusive rocks (Early Oligocene to Early Miocene) at surface, covers 1.0 % of this area

RHYOLITIC FLOWS AND SHALLOW INTRUSIVE ROCKS

Lithology: rhyolite; dacite; trachyte

Andesite and related rocks of intermediate composition (Late Eocene to Middle Eocene) at surface, covers 0.2 % of this area

ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION-Flows and breccias

Lithology: andesite; latite

Intrusive rocks of mafic and intermediate composition (Miocene to Quaternary) at surface, covers < 0.1 % of this area

INTRUSIVE ROCKS OF MAFIC AND INTERMEDIATE COMPOSITION

Lithology: andesite; rhyodacite; basalt; sedimentary rock

Platy limestone and limy siltstone, chert at base (Silurian to Early Devonian) at surface, covers 0.1 % of this area

PLATY LIMESTONE AND LIMY SILTSTONE, CHERT AT BASE-Includes units such as Roberts Mountains Formation, and Storff Formation and Chellis Limestone of Decker (1962). Locally includes rocks of Early Devonian age at top.

Lithology: limestone; dolostone (dolomite); chert; siltstone; shale

Phyllite, shale, and limestone (Middle Cambrian to Ordovician) at surface, covers 0.5 % of this area

PHYLLITE, SHALE, AND LIMESTONE-Locally includes chert and quartzite. Includes Tennessee Mountain Formation of Bushnell (1967) in western Elko County, Broad Canyon sequence of Means (1962) in Lander County, and rocks originally mapped as Palmetto Formation in Toiyabe and Toquima Ranges, northern Nye County

Lithology: shale; limestone; sandstone; chert

Shale, siliceous siltstone, chert, and minor amounts of limestone (Devonian) at surface, covers < 0.1 % of this area

SHALE, SILICEOUS SILTSTONE, CHERT, AND MINOR AMOUNTS OF LIMESTONE-Includes Cockalorum Wash Formation of northern Nye County and Woodruff Formation and unnamed rocks in Elko County

Lithology: shale; chert; limestone; siltstone; dolostone (dolomite); sandstone

Siliceous and volcanic rocks (Ordovician to Devonian) at surface, covers < 0.1 % of this area

SILICEOUS AND VOLCANIC ROCKS-Chert, shale, quartzite, greenstone, and minor amounts of limestone. Includes units such as Valmy Formation of north-central Nevada and some rocks mapped as Palmetto Formation in northern part of Esmeralda County and adjacent parts of Mineral and Nye Counties. Locally includes rocks of Silurian and Devonian age.

Lithology: chert; quartzite; shale; greenstone; limestone; conglomerate; siltstone; chemical

Quaternary alluvium and marine deposits (Pliocene to Holocene) at surface, covers < 0.1 % of this area

Alluvium, lake, playa, and terrace deposits; unconsolidated and semi-consolidated. Mostly nonmarine, but includes marine deposits near the coast.

Lithology: alluvium; terrace; lake or marine deposit (non-glacial)

Conglomerate, sandstone, shale, and dolomite of Diablo Formation below and shale, sandstone, and conglomerate of Candelaria Formation above (Early Permian to Early Triassic) at surface, covers < 0.1 % of this area

CONGLOMERATE, SANDSTONE, SHALE, AND DOLOMITE OF DIABLO FORMATION BELOW AND SHALE, SANDSTONE, AND CONGLOMERATE OF CANDELARIA FORMATION ABOVE (Lower or Upper Permian to Lower Triassic)-Mineral, Esmeralda, and northwestern Nye Counties

Lithology: shale; siltstone; sandstone; dolostone (dolomite); limestone; conglomerate

Andesite and related rocks of intermediate composition (Late Miocene to Middle Miocene) at surface, covers 0.4 % of this area

ANDESITE AND RELATED ROCKS OF INTERMEDIATE COMPOSITION-Flows and breccias

Lithology: andesite; latite; trachyte; dacite

Shale, sandstone, volcanogenic clastic rocks, andesite, rhyolite, and locally thick carbonate units (Late Triassic to Early Cretaceous) at surface, covers < 0.1 % of this area

SHALE, SANDSTONE, VOLCANOGENIC CLASTIC ROCKS, ANDESITE, RHYOLITE, AND LOCALLY THICK CARBONATE UNITS-Undivided sequence locally containing recognizable equivalents of the Luning and Dunlap Formations

Lithology: rhyolite; andesite; dacite; trachyte; argillite; shale; sandstone; siltstone; carbonate; basalt

Tuffaceous sedimentary rocks (Early Oligocene to Early Miocene) at surface, covers 0.4 % of this area

TUFFACEOUS SEDIMENTARY ROCKS-Locally includes minor amounts of tuff

Lithology: sandstone; siltstone; limestone; conglomerate; mudstone; debris flow; landslide; tuff

Morainal deposits (Quaternary) at surface, covers < 0.1 % of this area

MORAINAL DEPOSITS

Lithology: glacial drift

Continental sedimentary rocks (Late Cretaceous to Eocene) at surface, covers < 0.1 % of this area

CONTINENTAL SEDIMENTARY ROCKS-Includes units such as Pansy Lee Conglomerate in Humboldt County, part of Cretaceous(?) and Tertiary rocks of Kleinhampl and Ziony (1967) in northern Nye County, and part of "older clastic rocks" of Tschanz and Pampeyan (1970) in Lincoln County

Lithology: conglomerate; sandstone; siltstone; mudstone; limestone

Volcanogenic sedimentary rocks, tuff, andesite and felsitic flows, and carbonate rocks (Permian to Jurassic (?)) at surface, covers 0.2 % of this area

VOLCANOGENIC SEDIMENTARY ROCKS, TUFF, ANDESITIC AND FELSITIC FLOWS, AND CARBONATE ROCKS-Age uncertain. Mineral, Esmeralda, and Northwest Nye Counties

Lithology: greenstone ; sandstone; volcanic rock (aphanitic); limestone; siltstone; conglomerate

Shale, chert, and limestone (Ordovician) at surface, covers < 0.1 % of this area

SHALE, CHERT, AND LIMESTONE-Includes Aura Formation of Decker (1962) in northwest Elko County and Perkins Canyon Formation of Kay and Crawford (1964) in northern Nye County

Lithology: shale; chert; limestone; quartzite

Limestone, cherty limestone, sandy limestone, and chert-pebble conglomerate (Pennsylvanian) at surface, covers < 0.1 % of this area

LIMESTONE, CHERTY LIMESTONE, SANDY LIMESTONE, AND CHERT-PEBBLE CONGLOMERATE (Lower and Middle Pennsylvanian)-Includes units such as Moleen and Tomera Formations of Dott (1955)

Lithology: limestone; conglomerate

Tuffaceous sedimentary rocks (Late Eocene to Late Miocene) at surface, covers 1 % of this area

TUFFACEOUS SEDIMENTARY ROCKS-Locally includes minor amounts of tuff

Lithology: sandstone; limestone; siltstone; conglomerate; mudstone; dolostone (dolomite); felsic volcanic rock; intermediate volcanic rock; mafic volcanic rock; tuff

Wyman Formation (Late Proterozoic) at surface, covers < 0.1 % of this area

WYMAN FORMATION-Phyllite and phyllitic siltstone and minor amounts of limestone, dolomite, and sandstone

Lithology: siltstone; limestone; sandstone; dolostone (dolomite)

Sedimentary rocks (Late Cretaceous to Oligocene) at surface, covers 0.1 % of this area

SEDIMENTARY ROCKS-Includes Sheep Pass Formation (Eocene) and related units and unnamed tuffaceous sedimentary rocks

Lithology: sandstone; conglomerate; limestone; siltstone; claystone; mudstone; shale; tuff; oil shale

Phyllitc siltstone, quartzite, and lesser amounts of limestone and dolomite (Late Proterozoic to Early Cambrian) at surface, covers < 0.1 % of this area

PHYLLITIC SILTSTONE, QUARTZITE, AND LESSER AMOUNTS OF LIMESTONE AND DOLOMITE-Includes Reed Dolomite; Deep Spring, Campito, Poleta, Harkless, and Saline Valley Formations; and Mule Spring Limestone

Lithology: siltstone; limestone; dolostone (dolomite); quartzite; sandstone

Granitic rocks (Paleocene to Late Miocene) at surface, covers < 0.1 % of this area

GRANITIC ROCKS-Mostly quartz monzonite and granodiorite

Lithology: granodiorite; quartz monzonite; granite; monzonite

Precambrian rocks, undivided, unit 1 (Death Valley) (Early Proterozoic to Mesozoic) at surface, covers < 0.1 % of this area

Conglomerate, shale, sandstone, limestone, dolomite, marble, gneiss, hornfels, and quartzite; may be Paleozoic in part

Lithology: sandstone; mudstone; dolostone (dolomite); limestone; conglomerate; gneiss; granitoid; metavolcanic rock

Landslide deposits (Quaternary) at surface, covers < 0.1 % of this area

LANDSLIDE DEPOSITS

Lithology: landslide; colluvium; sedimentary rock

Basalt flows (Miocene to Quaternary) at surface, covers 1 % of this area

BASALT FLOWS-Locally includes maar deposits

Lithology: basalt; andesite; trachybasalt; latite; andesite

Quartzite, phyllitic siltstone, conglomerate, limestone, and dolomite (Late Proterozoic) at surface, covers 0.2 % of this area

QUARTZITE, PHYLLITIC SILTSTONE, CONGLOMERATE, LIMESTONE, AND DOLOMITE-Includes McCoy Creek Group (excluding Stella Lake Quartzite) in east-central Nevada and Johnnie Formation in southern Nevada.

Lithology: quartzite; shale; conglomerate; siltstone; dolostone (dolomite)

Limestone and sparse dolomite, siltstone, and sandstone (Mississippian to Early Permian) at surface, covers < 0.1 % of this area

LIMESTONE AND SPARSE DOLOMITE, SILTSTONE, AND SANDSTONE-Includes units such as undivided Riepe Spring Limestone of Steele (1960) and Ely Limestone or their equivalent in Elko, White Pine, and northern Lincoln Counties and most of the Bird Spring Formation and Callville Limestone in Clark and southern Lincoln Counties. Includes some stratigraphically higher Permian rocks in Leppy Peak, easternmost Elko County.

Lithology: limestone; sandstone; siltstone; chert; shale; dolostone (dolomite); conglomerate

Limestone and dolomite, locally thick sequences of shale and siltstone (Late Cambrian to Middle Cambrian) at surface, covers 1 % of this area

LIMESTONE AND DOLOMITE, LOCALLY THICK SEQUENCES OF SHALE AND SILTSTONE-Includes units such as Pioche Shale, Eldorado Dolomite, Geddes Limestone, Secret Canyon Shale, Hamburg Dolomite, Dunderberg Shale, and Windfall Formation of northern Nevada and Carrara, Bonanza King, and Nopah Formations of southern Nevada.

Lithology: limestone; dolostone (dolomite); shale; siltstone; sandstone; chert; conglomerate

Tertiary pyroclastic and volcanic mudflow deposits, unit 8 (Northern Mojave Desert) (Tertiary (4-22 Ma)) at surface, covers < 0.1 % of this area

Tertiary pyroclastic and volcanic mudflow deposits.

Lithology: rhyolite; dacite; andesite; basalt; volcanic breccia (agglomerate); tuff; ash-flow tuff; ignimbrite

Shale, mudstone, siltstone, sandstone, and carbonate rock; sparse volcanic rock (Late Triassic to Early Jurassic) at surface, covers < 0.1 % of this area

SHALE, MUDSTONE, SILTSTONE, SANDSTONE, AND CARBONATE ROCK; SPARSE VOLCANIC ROCK (Upper Triassic and Lower Jurassic)-Includes Auld Lang Syne Group, Nightingale sequence of Bonham (1969), and Gabbs and Sunrise Formations

Lithology: claystone; shale; sandstone; siltstone; carbonate; volcanic rock (aphanitic); conglomerate

Metamorphic rocks (Early Proterozoic) at surface, covers < 0.1 % of this area

METAMORPHIC ROCKS-Gneiss and schist and lesser amounts of gneissic granite, pyroxenite, hornblendite, migmatite, pegmatite, and marble.

Lithology: gneiss; schist; marble; granite; pyroxenite; hornblendite; migmatite; pegmatite; amphibolite

Continental deposits of siltstone, shale, conglomerate, and limestone (Cretaceous) at surface, covers < 0.1 % of this area

CONTINENTAL DEPOSITS OF SILTSTONE, SHALE, CONGLOMERATE, AND LIMESTONE-Includes units such as King Lear Formation in Humboldt County, Newark Canyon Formation in Eureka County, Willow Tank Formation and baseline Sandstone in Clark County

Lithology: conglomerate; sandstone; limestone; mudstone; siltstone

Cambrian marine rocks (Late Proterozoic to Middle Devonian) at surface, covers < 0.1 % of this area

Sandstone, shale, limestone, dolomite, chert, quartzite, and phyllite; includes some rocks that are possibly Precambrian

Lithology: sandstone; dolostone (dolomite); mudstone; limestone; quartzite; conglomerate; chert