Geologic Map of Lassen Volcanic National Park and Vicinity, California:
main page at USGS
Geologic Map of Lassen Volcanic National Park and Vicinity, California:
Sheet 1, geologic map
Geologic Map of Lassen Volcanic National Park and Vicinity, California:
Sheet 2, correlation chart
Geologic Map of Lassen Volcanic National Park and Vicinity, California:
Sheet 3, figures
Geologic Map of Lassen Volcanic National Park and Vicinity, California:
pamphlet (write up of the geology)
Susan River (Wikipedia)
Susan River Area Rapid Watershed Assessment (USDA NRCS)
Bizz Johnson Trail and Susan River (BLM)
Bizz Johnson Trail and Susan River (Friends of the River)
Great Basin (NPS)
Great Basin (Wikipedia)
Ishi, Thousand Lakes & Caribou Wilderness (order the wilderness map)
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