I get a lot of interesting questions from visitors to our San Francisco Wells Fargo History Museum. During a recent tour for a group of fourth graders, one parent asked me, “Where does the term ‘Mother Lode’ come from?” Although it was a simple question, the origins of this term that we refer to so often when interpreting our history eluded me. I decided to investigate the mysterious past of the phrase “Mother Lode.”
If you grew up in California, chances are you’ve gotten your share of Gold Rush history, or maybe panned for gold in the American River—and learned (hopefully) that there were 49ers other than our local football team. If you recall some of that history, the “Mother Lode” in California refers to the gold-bearing zone stretching 120 miles along the Sierra Nevada foothills. In 1849, miners from all parts of the world were migrating to the region in hopes of striking it rich. Wells Fargo and Company was established in 1852 in bustling San Francisco to provide financial services to these pioneers.
Aside from the California Gold Rush, there were other “rushes” around the world for naturally occurring minerals, particularly in the Southern Hemisphere. Explorer Cristóbal de Olid led the first Spanish expedition to present-day Guanajuato, Mexico in 1522. The discovery of gold and silver in the region prompted a large colonizing effort by the Spanish, and extensive mining operations got underway. In 1548, miners in the Guanajuato area discovered a gigantic silver vein, 6.84 miles in length (11 kilometers). The name given to this large silver vein was “Veta Madre,” translating in English to “Mother Lode.”
Fast forward to January 24th, 1848. The California Gold Rush begins with the discovery of placer gold (gold that is displaced from its hard rock source). Miners soon traced the gold upstream to find its vein source, or “mother.” California miners in the early 1850s may have coined the term “Mother Lode” to describe this discovery of the lode’s source (lode, meaning mineral deposit), or perhaps miners who spoke Spanish applied the name for its similarity to the grand Veta Madre discovered centuries before.
But it goes without saying that the discovery of this mother lode almost two centuries ago was the defining moment in our Golden State’s history—and a key moment in the history of America.