The data used to create the datasets used in this analysis are USGS publications: 1) Alaska Resource Data File - USGS OFR 2008-1225; 2) Alaska Geochemical Database, ver. 3 - USGS Data Series 1117; 3) Geologic map of Alaska - USGS SIM 3340; and 4) Watershed Boundary Dataset - The National Map. Level 1 revision was completed on May 20, 2021 by Keith Labay. Changes were made to the organization and descriptions of the files that were an improvement over what was originally posted.