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 |
| 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.