Here are some digital resources…
Northern California
- California Geological Survey: Watersheds Mapping Series (1:24,000 scale geologic maps)
- California Geological Survey: Watershed Compilation Maps (1:24,000)
- McLaughlin et al. (2000) Geology of the Cape Mendocino, Eureka, Garberville, and Southwestern Part of the Hayfork 30 x 60 Minute Quadrangles and Adjacent Offshore Area, Northern California
- Ogle (1953) Geology of Eel River Valley Area Humboldt County, California, San Francisco, Division of Mines, Bulletin 164, pp. 128.
Course Material and Educational Resources