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Geology -- California.

View Resource Yosemite Geology

The National Park Service maintains the Yosemite National Park Web site and the corresponding Geology page. This Web site gives an overview of the geologic history of the site, tells how the Sierra Nevada range formed, explains the basics of granitic rock, shows how glaciers carved out the canyons, and much more.[JAB]
View Resource Lake Tahoe Data Clearinghouse

The Lake Tahoe Data Clearinghouse Web site is part of the US Geological Survey's Lake Tahoe Initiative. The agency's goal for the site is to facilitate the coordination of research, monitoring, and environmental-management activities in the Lake Tahoe Basin and to ensure the widest possible access to data and information resulting from such activities. Products available include Digital Elevation...
View Resource The California Geotour: Online Geologic Field Trip Guides

There are many great ways to learn about the geological history of California, including reading some of the works by noted writer John McPhee. Additionally, the state of California's Department of Conservation has created these very fine online geologic field trip guides. It might be more accurate to say that the site is an interactive index of web pages that contain geologic field guides...