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Lee M. Osmonson, USGS, Denver, CO (comp.). Feliks M. Persits, Contractor to USGS, Denver, CO (comp.). Douglas W. Steinshouer, Contractor to USGS, Denver, CO. Timothy R. Klett, USGS, Denver, CO (comp.) and others. (). World Geologic Provinces, 2000. [Shapefile]. U.S. Geological Survey. Retrieved from https://geo.nyu.edu/catalog/sde-columbia-landinfo_world_gelogicprov_2000