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Pennsylvania Spatial Data: Devonian Siltstone Shale Assessment Unit Quarter M...
From the site: "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... -
Pennsylvania Spatial Data: Catskill Sandstones Siltstones Assessment Unit
From the site: "The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit... -
Pennsylvania Spatial Data: Devonian Siltstone Shale Assessment Unit
From the site: "The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit... -
Pennsylvania Spatial Data: Catskill Sandstones Siltstones Assessment Unit Qua...
From the site: "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...