Somewhere between 655,000 and 758,000 years ago, California’s Central Valley was covered by a shallow body of water known as Lake Corcoran. Lake Corcoran covered the valley from what are now the Tehachapi Mountains to the Sierra Buttes and at its greatest extent was as large as Lake Michigan is today. It drained into the Pacific through what is now the Salinas River and Monterey Bay. It is hypothesized that Lake Corcoran provided much of the … [Read More...]