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Plate II. Relation of Lithostratigraphic Units to Hydrogeologic Units, Wind

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Plate II. Relation of Lithostratigraphic Units to Hydrogeologic Units, Wind Lithostratigraphic units of Love et al. (1993) Hydrogeologic unit of Wyoming Hydrogeologic role/unit of System and Series Statewide Framework Plan (WWC Hydrogeologic unit used in this report ERA Wind River Wind River Basin Richter (1981) Range Engineering et al., 2007, fig. 4-9) Alluvial aquifers, terrace- Alluvium, terrace deposits, deposit aquifers, aquifers in Holocene landslide deposits, landslide deposits, aqui- and Major aquifer Major aquifer–alluvial dune sand (eolian) deposits, and fers in dune sand (eolian) Pleistocene Quaternary Quaternary glacial deposits deposits, and glacial-deposit deposit aquifers aquifers unconsolidated- Pliocene1 South Pass Formation2 Miocene Major aquifer–sandstone Split Rock aquifer Split Rock Aquifer (Arikaree aquifer)3 Formation3 CENOZOIC Split Rock Formation3 Tertiary Oligocene White River Formation Marginal aquifer White River aquifer Upper and 2 Tepee Trail Fm Wagon Bed Formation–marginal middle Eocene Fm Leaky confining unit Aycross–Wagon Bed confining unit rocks aquifer 2 Eocene Aycross Fm rocks Bed Wagon Eocene Major aquifer Wind River Formation Major aquifer–sandstone Wind River aquifer (Wind River aquifer) Indian Meadows Fm Leaky confining unit Major aquitard Indian Meadows confining unit Conglomerate of Roaring Fork2 Shotgun Mbr Waltman Shale Mbr Paleocene Fm Minor aquifer Fort Union aquifer Lower Fort Union unnamed Mbr Aquifer (Fort Union–Lance aquifer) aquifer Lance Formation Major aquifer–sandstone Lance aquifer Fort Union–Lance Lewis Shale Meeteetse Fm Confining unit Major aquitard Meeteetse–Lewis confining unit Lewis Shale Teapot Sandstone Confined subaquifer Teapot Sandstone aquifer Member (Teapot horizon aquifer) Middle unnamed Mesaverde Confining unit Middle confining unit member Minor aquifer Formation Parkman Ss Mbr Parkman Ss aquifer Wallace Creek Tongue of Confined subaquifer Mesaverde aquifer Mesaverde Formation Cody Shale Confining unit Upper (Parkman-Fales aquifer) Cretaceous Fales Ss Member Aquifer (Measaverde aquifer) Fales Ss aquifer Cody Cody Cody Regional confining unit Major aquitard Shale Shale confining unit Cretaceous Aquifer (Frontier aquifer) Frontier aquifer Frontier Formation Minor aquifer Regional confining unit Basal regional confining unit Leaky confining unit/regional Mowry MESOZOIC Mowry Shale Major aquitard confining unit confining unit Muddy Sandstone Muddy Sandstone Aquifer (Muddy aquifer) ? Muddy Sandstone4 ? aquifer Leaky confining unit/regional Thermopolis confining unit Thermopolis Shale Major aquitard confining unit confining unit Mowry–Thermopolis Lower “Dakota Sandstone” Cretaceous Cloverly Formation Aquifer (Cloverly aquifer) Minor aquifer Cloverly aquifer “Fuson Shale” “Lakota Sandstone” Upper Morrison Formation Leaky confining unit Minor aquifer Morrison confining unit Jurassic Regional aquifer Sundance Formation Minor aquifer Sundance aquifer (Sundance–Nugget aquifer) Jurassic Middle Jurassic aquifer Regional confining unit/leaky Gypsum Spring Lower and middle Mesozoic aquifers confining units Gypsum Spring Formation confining unit Marginal aquifer confining unit Sundance–Nugget Jurassic(?) and Triassic(?) Nugget Sandstone Not discussed Major aquifer–Sandstone Nugget aquifer Upper Popo Agie Formation or Member Confining unit Popo Agie confining unit Triassic Crow Mountain Ss or Sandstone Member Aquifer Crow Mountain aquifer Marginal aquifer or Fm Alcova Limestone or Limestone Member Leaky Alcova confining unit Confining unit Triassic Lower Chugwater aquifer confining unit Chugwater Group Red Peak Formation or Member Aquifer Red Peak aquifer Triassic Chugwater–Dinwoody Dinwoody Formation Confining unit Marginal aquifer aquifer and confining unit Dinwoody c.u. Goose Egg Phosphoria Formation Aquifer/leaky confining unit Phosphoria aquifer Permian Forma- Minor aquifer and related rocks (Park City Fm) tion (Phosphoria aquifer) and confining unit confining unit Phosphoria aquifer and Goose Egg– Goose Egg aquifer and confining unit Upper - Pennsylvanian Aquifer Tensleep Sandstone Major aquifer–limestone5 Tensleep aquifer Middle (Tensleep subaquifer) Pennsylvanian nian Lower Amsden Formation Pennsylva Pennsylvanian Aquifer Marginal aquifer Amsden aquifer (Amsden subaquifer) Upper Darwin Ss Mbr Mississippian Aquifer Major aquifer–limestone Madison aquifer Lower Madison Limestone (Madison subaquifer) Mississippian Mississippian - Upper Darby Formation Aquifer nian Devonian Tensleep aquifer system Tensleep Paleozoic aquifer system Devo Major aquifer–limestone Darby aquifer PALEOZOIC (Darby subaquifer) Silurian6 Upper Ordovician Aquifer Major aquifer–limestone/ Bighorn Dolomite7 Bighorn aquifer Middle (Bighorn subaquifer) minor aquifer Ordovician Ordovician Snowy Range Upper Formation2 Gallatin Limestone Minor aquifer Gallatin confining unit Cambrian Pilgrim Limestone2 Leaky confining unit Gros Ventre Middle Gros Ventre Formation Minor aquifer confining unit Cambrian confining unit Cambrian Ventre Gallatin–Gros Flathead Sandstone Aquifer (Flathead aquifer) Major aquifer–limestone5 Flathead aquifer Precambrian Precambrian rocks Major aquitard Precambrian basal confining unit 1Pliocene rocks not present in Wind River Basin. Abbreviations used in the columns: Modified from Richter (1981); Love et al. (1993); 2Function of lithostratigraphic unit as hydrogeologic unit not defined. c.u. Confining unit and WWC Engineering et al. (2007) 3Split Rock Formation previously defined as Arikaree Formation in Wind River Basin Fm Formation (Love et al., 1993). Ss Sandstone 4Function of Muddy Sandstone as hydrogeologic unit not defined inWWC Engineering et al. Mbr Member (2007, fig. 4-9). 5Predominant lithology of formation is sandstone, and it is unknown why formation is defined as “Major aquifer–limestone” in WWC Engineering et al. (2007, fig. 4-9). 6Silurian rocks not present in Wind River Basin. 7Composed of upper Leigh Dolomite Member and Lander Sandstone Member (Keefer and Van Lieu, 1966; Richter, 1981, table IV-1, and references therein). Plate II. Relation of lithostratigraphic units to hydrogeologic units, Wind River Basin, Wyoming..
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