The California Geotour is an interactive index of Web pages of geologic field trip guides and related Web sites compiled by the California Geological Survey (CGS) for the benefit of all who have wondered about California's geologic features. We have listed Web pages that contain geologic information, including photographs, maps, text and directions for local natural features throughout the state.
USGSThe USGS serves the Nation by providing reliable scientific information to describe and understand the Earth; minimize loss of life and property from natural disasters; manage water, biological, energy, and mineral resources; and enhance and protect our quality of life.