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Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production, and distribution of production in an assessment unit or province. Each cell represents a quarter-mile square of the land surface, and the cells are coded to represent whether the wells included within the cell are predominantly oil-producing, gas-producing, both oil and gas-producing, dry, or the type of production of the wells located within the cell is unknown. The well information was initially retrieved from the IHS Energy Group, PI/Dwights PLUS Well Data on CD-ROM, which is a proprietary, commercial database containing information for most oil and gas wells in the...
Categories: Data, pre-SM502.8; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: 504501 = Barnett Paleozoic, 50450101 = Paleozoic Shelf and Bank Carbonate Oil and Gas, 50450102 = Mississippian Chappel Pinnacle Reef Oil and Gas, 50450161 = Greater Newark East Frac-Barrier Continuous Barnett Shale Gas, 50450162 = Extended Continuous Barnett Shale Gas, All tags...
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Dispersal, establishment, and spread of aquatic invasive species such as the zebra mussel (Dreissena polymorpha) can be influenced by riverine velocities and volumetric flows in invaded lake-stream ecosystems. Zebra mussels, which have a planktonic larval form (veliger), disperse rapidly downstream from a source population. Concentrations, dispersal, and body conditions of zebra mussel veligers were studied under different volumetric flow, or discharge, conditions in a coupled lake-stream ecosystem in northern Texas, USA. Veliger densities in lotic environments were strongly related to population dynamics in upstream lentic source populations. A strong exponential decrease in veliger density was observed through...
    map background search result map search result map Biological and physical data for zebra mussel (Dreissena polymorpha) veligers collected from a coupled lake-stream ecosystem in north Texas, 2012-2014 USGS 1:100000-scale Quadrangle for Fort Worth, TX 1985 USGS 1:100000-scale Quadrangle for Fort Worth, TX 1985 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1995 National Assessment of Oil and Gas Project Bend Arch-Ft. Worth Basin Province (045) Quarter-Mile Cells USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1955 USGS 1:24000-scale Quadrangle for Fort Worth, TX 1995 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 USGS 1:125000-scale Quadrangle for Fort Worth, TX 1894 Biological and physical data for zebra mussel (Dreissena polymorpha) veligers collected from a coupled lake-stream ecosystem in north Texas, 2012-2014 USGS 1:100000-scale Quadrangle for Fort Worth, TX 1985 USGS 1:100000-scale Quadrangle for Fort Worth, TX 1985 National Assessment of Oil and Gas Project Bend Arch-Ft. Worth Basin Province (045) Quarter-Mile Cells