The Map Collection holds a large collection of geologic maps, historic folios, atlases, field guides, and air photos of geologic features. Our geologic maps emphasize California, but other regions of the United States are also represented. Of particular interest is the large collection of Dibblee geologic maps and reports. Thomas Wilson Dibblee, Jr. was one of the most prolific field geologists in American history. Over a period of 60 years, he conducted geologic mapping of a large portion of the state of California, establishing the "Dibblee map" as the gold standard for geologic maps of southern and coastal California.
- Dibblee Geologic Map Collection
- Geologic Sheet Maps of Southern California (USGS, CGS)
- USGS Geologic Atlas of the United States (selected folios)