Old Mines of Southern California Desert-Mountain-Coastal Areas Including the Calico-Salton Sea Colorado River Districts and Southern Counties

This listening experience takes you into a meticulous survey of Southern California's historic mining districts, guided by the observations of a state mineralogist from the late 19th century. The narrator walks through the rugged terrain around Los Angeles County, describing the complex geology of the San Gabriel Canyon and the striking fault lines that shape the region. Listeners will hear vivid details about the rock types—schist, gneiss, diorite intrusions—and how they set the stage for valuable mineral deposits.

The centerpiece is the Kelsey Mine, famed for its silver vein that fills a fissure created by massive tectonic movement. The description explores the vein’s composition—native silver, argentite, cobalt ores, nickel arsenate, and a host of secondary minerals—along with the thick clay gouge that lines its walls. By the end of the first act, you’ll have a clear picture of the geological forces that forged this rich ore body and the challenges early prospectors faced in extracting it.