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Federal
Circum-Arctic Resource Appraisal (north of the Arctic Circle) Assessment Units recent views
Department of the Interior —
The Assessment Unit is the fundamental unit used in the World Petroleum Resources Project. The Assessment Unit is defined within the context of the higher-level Total... -
Federal
Geologic Provinces of the Arctic, 2000 (prvarcst) recent views
Department of the Interior —
This coverage includes arcs, polygons and polygon labels that describe Arctic portion of the U.S. Geological Survey defined geologic provinces of the World in 2000.