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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...
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View within SubmissionGathering Resources...From the site: "Location of mined areas, including surface and deep coal and non-coal mining. Data incomplete, areas not mapped when screened at small scales during low level...-
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View within SubmissionGathering Resources...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...-
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View within SubmissionGathering Resources...Link to an Applied Geochemistry paper from Science Direct through SciTech Connect. The paper discusses the chemical processes at work in Allegheny County, PA, and uses stable...-
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View within SubmissionGathering Resources... -