Plate T. Relation of Lithostratigraphic Units to Hydrogeologic Units, Sierra Madre, Medicine Bow Mountains, and Saratoga Valley
Total Page：16
File Type：pdf, Size：1020Kb
Hydrogeologic role/unit of Richter (1981a; Hydrogeologic division of Lowry et al. (1973) Hydrogeologic role/unit of Statewide Lithostratigraphic units of Love et al. Hydrogeologic role/unit of Saulnier (1968)3 Figure II-6, Table IV-2, and text) Hydrogeologic unit of Lenfest (1986) Hydrogeologic unit used in this report for [Laramie, Hanna, and Shirley Basins including Framework Water Plan SYSTEM AND SERIES (1993) in the Sierra Madre and [North flank of Medicine Bow Mountains [Laramie, Hanna, and Shirley Basins; and Crist (1990) Sierra Madre, Medicine Bow Mountains, Sierra Madre, Medicine Bow Mountains (WWC Engineering et al., 2007, Figure 4-9) Medicine Bow Mountains and Pass Creek Basin area] Sierra Madre, Medicine Bow Mountains [Saratoga Valley area] and Saratoga Valley ERATHEM (east flank), and Saratoga Valley] [All of Wyoming] (east flank), and Saratoga Valley] Holocene 2 QUATERNARY and Alluvium and terrace deposits Quaternary aquifers Local aquifers5 Local aquifers8 Quaternary unconsolidated-deposit aquifers Pleistocene Major aquifer–alluvial Giant Pliocene unit not defined Not discussed Not discussed Not discussed Not discussed conglomerate Hydrogeologic role/ Basalt flows and Browns Park 8 Hydrogeologic role/ Miocene 2 Not discussed Not discussed Aquifer Major aquifer–sandstone Browns Park aquifer intrusive masses Formation Unit 7 unit not defined CENOZOIC TERTIARY Oligocene White River Formation Marginal aquifer White River aquifer and confining unit Principal aquifers–Tertiary aquifers6 Eocene Coalmont Formation Hydrogeologic role/ Hanna Not discussed Not discussed Not discussed Formation unit not defined Paleocene Marginal aquifer Hanna aquifer Unit 6 Lewis Shale Confining unit with local discontinuous saturated sandstone lenses Major aquitard Lewis confining unit Mesaverde Formation Secondary aquifer–Mesaverde aquifer Major aquifer Mesaverde aquifer Upper Steele Shale Confining unit with locally permeable sandstone beds4 Major aquitard Steele confining unit Cretaceous Leaky confining unit Niobrara Formation Potentially permeable in some zones4 Major aquitard Niobrara confining unit CRETACEOUS Frontier Formation Secondary aquifer–Frontier aquifer Minor aquifer Frontier aquifer Unit 5 Mowry Shale Major aquitard ? Regional leaky Mowry-Thermopolis Muddy Sandstone 4 7 ? Muddy Sandstone9 ? Muddy Sandstone aquifer Aquifer confining unit Aquifer confining unit Lower Thermopolis Shale Major aquitard Cretaceous Cloverly Formation Aquifer4 Principal aquifer–Cloverly aquifer Minor aquifer Cloverly aquifer MESOZOIC Upper Morrison Formation Leaky confining unit with local discontinuous saturated sandstone lenses Minor aquifer Morrison aquifer and confining unit Jurassic JURASSIC Sundance Formation Aquifer4 Secondary aquifer–Sundance aquifer Marginal aquifer Sundance aquifer Middle Unit 4 Jurassic JURASSIC (?) AND TRIASSIC (?) Locally permeable Aquifer5 Not discussed Jelm aquifer Upper Jelm Formation zones4 Triassic TRIASSIC Chugwater Formation Major aquitard Chugwater confining unit Lower Chugwater Formation Triassic of Darton (1908) Regional leaky confining unit with locally Unit 3 permeable sandstone and fractured Not discussed Goose limestone interbeds Goose Egg Egg Major aquitard Hydrogeologic role/unit Forelle Limestone Major aquitard confining unit PERMIAN Formation not defined in this area Satanka Shale Major aquitard Satanka confining unit Upper Pennsylvanian Tensleep Casper 4 Tensleep Casper Major aquifer– Major aquifer– Aquifer 10 Tensleep aquifer Casper aquifer Sandstone Formation aquifer aquifer limestone limestone Middle aquifer PENNSYLVANIAN ? Pennsylvanian Casper-Tensleep Locally permeable Unit 2 Lower Amsden Confining unit Marginal aquifer Amsden aquifer Pennsylvanian Formation zones4 Upper Mississippian MISSISSIPPIAN Lower 5 Mississippian Madison Limestone Confining unit Major aquifer–limestone Madison aquifer Upper PALEOZOIC Devonian DEVONIAN1 Lower Devonian SILURIAN1 Middle Silurian Upper Ordovician ORDOVICIAN1 Middle Ordovician Lower Ordovician Upper Cambrian CAMBRIAN1 Lower Cambrian PRECAMBRIAN Precambrian rocks Unit 1 Confining unit with locally permeable zones5 Major aquitard Precambrian basal confining unit 1Rocks of Devonian, Silurian, Ordovician, and Cambrian age not present in Sierra Madre, Medicine Bow Mountains, and Saratoga Valley. 2Function of lithostratigraphic unit as hydrogeologic unit not discussed by previous investigators. 3Saulnier (1968) only discussed hydrogeologic characteristics of permeable lithostratigraphic units (aquifers). 4Hydrogeologic role/unit inferred from description provided in text (Saulnier, 1968, p. 58–68). 5Hydrogeologic role/unit inferred from description provided in “Hydrologic Properties” column (Richter, 1981a, Table IV-2). 6Each lithostratigraphic unit in “Tertiary aquifer” category is inferred to be an individual aquifer on the basis of description provided in “Hydrologic Properties” column (Richter, 1981a, Table IV-2). 7Muddy Sandstone inferred to be an aquifer within “Leaky confining unit” classification on the basis of description provided in “Hydrologic Properties” column (Richter, 1981a, Table IV-2). 8Quaternary-unconsolidated deposit aquifers and Browns Park aquifer can be hydraulically connected at some locations. 9Function of Muddy Sandstone as hydrogeologic unit not defined in WWC Engineering et al. (2007, Figure 4-9). 10Predominant lithology is sandstone, and it is unknown why formation is defined as “Major aquifer-limestone” in WWC Engineering et al. (2007, Figure 4-9). Plate T. Relation of lithostratigraphic units to hydrogeologic units, Sierra Madre, Medicine Bow Mountains, and Saratoga Valley..