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This dataset captures in digital form the results of previously published U.S. Geological Survey (USGS) Water Mission Area studies related to water resource assessment of Cenozoic strata and unconsolidated deposits within the Mississippi Embayment and the Gulf Coastal Plain of the south-central United States. The data are from reports published from the late 1980s to the mid-1990s by the Gulf Coast Regional Aquifer-System Analysis (RASA) studies and in 2008 by the Mississippi Embayment Regional Aquifer Study (MERAS). These studies, and the data presented here, describe the geologic and hydrogeologic units of the Mississippi embayment, Texas coastal uplands, and the coastal lowlands aquifer systems, south-central...
Tags: 3D, Alabama, Arkansas, Cane River Formation, Carrizo Sand, All tags...
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This digital dataset was created as part of a U.S. Geological Survey hydrologic resource assessment and development of an integrated numerical hydrologic model of the hydrologic system of the Upper Colorado River Basin, an extensive region covering approximately 412,000 square kilometers in five states: Wyoming, Colorado, Utah, Arizona, and New Mexico. As part of this larger study, the USGS developed this digital dataset of geologic data and a three-dimensional hydrogeologic framework model (3D HFM) that define the elevation, thickness, and extent of seven hydrogeologic units in the Upper Colorado River Basin. The hydrogeologic setting of the Colorado Plateau consists of thick Paleozoic, Mesozoic, and Cenozoic aquifers,...
Tags: 3D, Arizona, Chinle Formation, Colorado, Colorado Plateau, All tags...
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This dataset captures in digital form previously published maps showing the inferred extent and subsurface elevation of several Paleozoic consolidated rock units in the northern Midwest of the United States. Data released here were published as figures within a U.S. Geological Survey (USGS) Water Mission Area report documenting results from a study of the regional hydrogeology and ground-water quality of the Cambrian-Ordovician aquifer system in the northern Midwest. This study was part of the USGS national Regional Aquifer-System Analysis (RASA) Program. Sandstone and carbonate rocks of Cambrian and Ordovician age compose much of the sedimentary rocks overlying the Precambrian basement in the northern Midwest and...
Tags: 3D, Bonneterre Formation, Cambrian, Cotter Dolomite, Derby-Doerun Dolomite, All tags...


    map background search result map search result map Digital hydrogeologic framework model of the Upper Colorado River Basin, western U.S. Surface and subsurface geologic data from previous USGS studies of the Gulf Coast region, south-central United States Digital data from previous USGS hydrogeologic studies of the Cambrian-Ordovician aquifer system in the northern Midwest, United States Digital data from previous USGS hydrogeologic studies of the Cambrian-Ordovician aquifer system in the northern Midwest, United States Digital hydrogeologic framework model of the Upper Colorado River Basin, western U.S. Surface and subsurface geologic data from previous USGS studies of the Gulf Coast region, south-central United States