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Federal
Alamagan Volcano - contacts and faults
Department of the Interior —
Alamagan Volcano is a Quaternary stratovolcano along the Mariana Arc, an active subduction zone in the western Pacific Ocean. Although primarily submerged, its peak... -
Federal
Geohydrologic unit boundaries along the Colorado Front Range
Department of the Interior —
This digital geospatial data set consists of geohydrologic unit boundaries shown in the report "Structure, outcrop, and subcrop of the bedrock aquifers along the...