This layer depicts the sedimentary shale Basins of the Continental United States.  A Basin is an area of tectonic origin in the earth's crust, in which sediments accumulate.  Shale Basins are one indicator of the potential presence of prospective oil & gas resources.  This layer is visible at scales smaller than 1:200,000.  Some of the features have been generalized at the smaller scales for consistency.  Where available, the boundary detail increases with the map scale.  The last known update for this data is 05/06/2011 provided by the Energy Information Administration (EIA): http://www.eia.gov/pub/oil_gas/natural_gas/analysis_publications/maps/maps.htm. 

Esri recommends using a topographic or relief basemap for viewing this content.  We also recommend using a 30-50% transparency on this map service.  The shale Basins content can be used in conjunction with the Shale Plays service (current and prospective exploration areas), the Gas Production service, or the Coalbed Methane Fields service.
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{'Title': 'DOE EIA Shale Basin', 'Author': 'Esri', 'Comments': "This layer depicts the sedimentary shale Basins of the Continental United States.  A Basin is an area of tectonic origin in the earth's crust, in which sediments accumulate.  Shale Basins are one indicator of the potential presence of prospective oil & gas resources.  This layer is visible at scales smaller than 1:200,000.  Some of the features have been generalized at the smaller scales for consistency.  Where available, the boundary detail increases with the map scale.  The last known update for this data is 05/06/2011 provided by the Energy Information Administration (EIA): http://www.eia.gov/pub/oil_gas/natural_gas/analysis_publications/maps/maps.htm. \n\nEsri recommends using a topographic or relief basemap for viewing this content.  We also recommend using a 30-50% transparency on this map service.  The shale Basins content can be used in conjunction with the Shale Plays service (current and prospective exploration areas), the Gas Production service, or the Coalbed Methane Fields service.", 'Subject': 'Sedimentary shale Basins of the Continental United States with the potential presence of prospective oil and gas resources.', 'Category': '', 'AntialiasingMode': 'None', 'TextAntialiasingMode': 'Force', 'Keywords': 'EIA,Shale,Basins,Plays,Oil,Gas,Energy Information Administration,U.S. Department of Energy,DOE,USA,National,Federal,A-16,A16,Energy'}
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