California Division of Mines and Geology

The California Division of Mines and Geology, now known as the California Geological Survey, is a government agency responsible for studying and mapping the state's geology, minerals, and natural resources. Its goal is to provide accurate geological information to support safe land use, resource management, and hazard mitigation, such as earthquake and landslide preparedness. The agency conducts research, creates maps, and offers technical guidance to help communities, industries, and policymakers understand California’s complex geology and make informed decisions to protect people and the environment.