An indispensable field guide with a general description of the types of rocks and minerals found in California and the type of geology in which they occur. This is followed by a section of general maps of the state outlining the types of rocks that will be encountered in those areas. Full- color photographs of 48 rocks and minerals found in California. This is followed by a section with information on hundreds of USGS quadrangle maps and the location of gold, silver and other minerals by township, range and section number. Vinson Brown, David Allan and James Stark, 200 pages, 5 1/2 x 9 inches with a soft cover.