Roger Weller, geology instructor
Original map is the Geologic Map of the United
United States Geological Survey
edited by P.B. King and H.M. Beikman, 1974
original scale was 1: 2,500,000
The same map, but with the culture removed
Features present in this map include: San Andreas fault system, the Big Valley,
Sierra Nevada Mountains, Las Vegas shear zone, and the Great Basin.