"Geologist Prost takes us on a road trip to better understand California's past. Blending science, history, and travel, he explores everything from the state's earthquake activity to the messy legacy of the gold rush. Making 56 stops as he travels from the Marin coast to the Central Valley, Prost offers an engaging, in-depth look at the geology that continues to shape California and the lives of those who call it home." —Alta Journal"A masterful and enlightening excursion through California's rich cultural and geological history, both above ground and under our feet." —Gary Noy, author of Gold Rush Stories and Gem of the Sierra"To fans of geology, California is a golden state. Follow a trail of nuggets across it with Gary Prost's treasure map." —Andrew Alden, author of Deep Oakland