An in-depth look at earth science and mineral resources in this maginificent desert and mountain wilderness. Includes seld-guiding auto tours, full-color geolog

In a subtle dance of arid solitude, two southern California deserts come together at Joshua Tree National Park. One is the Colorado Desert—an extension of the

Since Mountain Press started the Roadside Geology series forty years ago, southern Californians have been waiting for an RG of their own. During those four deca

The saga of the early prospectors and all the others who made their mark during the Gold Rush. This historical visitor's guide includes recommended routes along