Geology Science and Environment California United States

Educational materials and photographic tours on the formation and occurrence of different types of caves, cave biology, and cave conservation. From the Oakland Museum of California.

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• California Underground: Our Caves and Subterranean Habitats - Educational materials and photographic tours on the formation and occurrence of different types of caves, cave biology, and cave conservation. From the Oakland Museum of California.
• California Geological Survey - Information on the state\'s geology, mineral resources, and geologic hazards.

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