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National Assessment of Oil and Gas Project - Uinta-Piceance Province (020) Tar Sand Deposits

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 05:21 AM | Dataset Last Updated: June 11, 2021 at 12:00 AM
Tar sands represent a significant source of hydrocarbons in the United States. Also known by several other names including bitumen-bearing rocks, natural asphalt, tarry oil, bituminous rock, oil sands and rock asphalt, these rocks are mostly located on the margins of sedimentary basins. Maps of tar sands and deposits were digitized to illustrate their distribution and extent within the Total Petroleum System.

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