| Online link | https://doi.org/10.3133/ofr20091254 |
|---|---|
| Description | Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS. |
| Originators | Till, Alison B., Dumoulin, Julie A., Werdon, Melanie B., Bleick, Heather A. |
| Publication | U.S. Geological Survey Open-File Report 2009-1254 |