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WRIR 01-4210: Hydraulic-Property Estimates for Use With a Transient Ground-Water Flow Model of the Death Valley Regional Ground-Water Flow System, Nevada and California

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Table 1. Geologic units and hydrogeologic units in the Death Valley regional ground-water flow system (DVRFS)

Hydrogeologic unit (this report)
Representative geologic units
Proposed transient
DVRFS hydrogeologic unit1

Younger and older alluvial
aquifers (YAA and OAA)
Quaternary stream-channel alluvium
Quaternary eolian deposits
Quaternary-Tertiary fan alluvium
Quaternary-Tertiary landslide deposits
Younger alluvial aquifer (YAA)

Older alluvial aquifer (OAA)

Alluvial confining unit (ACU) Quaternary-Tertiary lacustrine and playa sediments
Quaternary-Tertiary spring-carbonate deposits
Alluvial confining unit (ACU)
Lava flow unit (LFU) Basalt of Crater Flat -- Amargosa Valley area
Basalt of Jackass Flats
Post-Thirsty Canyon basalt flows
Funeral Formation
Basalt of Lunar Crater area
Lava flow unit (LFU)
Younger volcanic unit and
volcaniclastic and sedimentary
rocks unit (YVU and VSU)
Furnace Creek Formation
Artist Drive Formation
Muddy Creek Formation
Horse Spring Formation
Pavits Spring Formation
Panuga Formation
Amargosa Valley Formation
Titus Canyon Formation
Sheep Pass Formation
Younger volcanic unit (YVU)

Volcaniclastic and sedimentary
rocks unit (VSU)

Tertiary volcanic rocks
Volcanics of Fortymile Canyon
Volcanics of Stonewall Mountain
Thirsty Canyon Group
Timber Mountain Group
Paintbrush Group
Crater Flat Group
Belted Range Group
Calico Hils Formation
Wahmonie Formation
Thirsty Canyon/Timber Mountain
volcanic aquifer (TMVA)

Paintbrush volcanic aquifer (PVA)

Calico Hills volcanic unit (CHVU)

Wahmonie volcanic unit (WVU)

Belted Range/Crater Flat unit (BRCFU)

Older volcanic unit (OVU)
 
Kane Wash Tuff Tub
Spring Tuff Hiko Tuff
Shingle Pass Tuff
Monotony Tuff
Volcanics of Quartz Mountain
Volcanic of Oak Spring Butte
Volcanics of Kawich Valley
Tunnel Formation
Leach Canyon Formation
Pahranagat Formation
Tuff of Williams Ridge and Morey Peak
Older volcanic unit (OVU)
Intrusive confining unit (ICU)
Tertiary intrusive rocks
Cretaceous intrusive rocks
Jurassic intrusive rocks
Intrusive confining unit (ICU)
Sedimentary rocks confining unit (SCU)
Chinle Formation
Moenkopi Formation
Kaibab Limestone
Toroweap Formation
Permian redbeds
Sedimentary rocks confining unit (SCU)
Upper and lower carbonate aquifer (UCA and LCA)
Monte Cristo Group
Pogonip Group
Joana Limestone
Guilmette Formation
Nopah Formation
Bonanza King Formation
Carrara Formation
Ely Springs Dolomite
Bird Spring Formation
Simonson Dolomite
Sevy Dolomite
Laketown Dolomite
Ely Springs Dolomite
Upper carbonate aquifer (UCA)

Lower carbonate aquifer (LCA)

Upper and lower clastic confining units (UCCU and LCCU)
Eleana Formation
Chainman Shale
Johnnie Formation
Pilot Shale Wood Canyon Formation
Zabriskie Quartzite
Stirling Quartzite
Pahrump Group
Upper clastic confining unit (UCCU)

Lower clastic confining unit (LCCU)

Crystalline confining unit (XCU)
Middle Proterozoic igneous and metamorphic rocks Crystalline confining unit (XCU)

1 Claudia Faunt, U.S. Geological Survey, written commun., 2001.