California

The Golden State's dynamic geology reflects powerful tectonic forces, active faults, volcanoes, and dramatic coastlines. Learn about California's mountains, valleys, and seismic history with GSA public science books. Home to the San Andreas Fault, the Sierra Nevada Mountains, Death Valley National Park, coastal features, and volcanic regions including the active Cascade Range, the Medicine Lake volcano, and the Mon-Inyo Craters there is so much to explore in California.