Geology, Geochemistry and other related reports
Alaska State Geo-spatial Data Clearinghouse ASGDC
Geo-spatial data, maps, interactive maps.
Geological map index of Alaska interactive tool
Interactive geological map database for Alaska. Tip, click on “more options” then “themes” to reveal useful datasets or layers. Keep in mind not every report will show up using this tool so a direct publications search is recommended whenever you are using this tool.
Geological maps of the United States online spatial data:
Interactive map and spatial data for download
I-Map Series/Geologic Investigations Series
Possibly important to note – “In August 1996, the I-map series name was changed from Miscellaneous Investigations Series Maps to Geologic Investigations Series. All geologic maps approved for publication after August 1996 were published in the Geologic Investigations Series.” searching using both terms couldn’t hurt after narrowing your research target area. Example page: