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The Stonewall Jackson Mine, San Diego County, California
July 2001 by Richard H. Peterson, PhD
For obvious reasons southern California is not known historically for its gold mines. Gold production was concentrated heavily in the Sierra Nevada foothills in the northern part of the state. However, the high mountainous region of eastern San Diego County was the site of a number of productive hardrock gold mines, notably in the late 19th century.Las Médulas—The Gem of the Roman Gold Mines
This mine was a real wonder of engineering, and the water supply and drifts had to be carefully managed to keep it in operation. In fact, it didn’t close due to lack of gold, but instead closed with the fall of the Roman Empire.
Gold and Rare Earth Elements in New Mexico
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
Spanish Silver in Arizona
When Spaniards entered what is now Arizona, they encountered diggings made by Opata Indians. The Opata Indians, who now live and mine in the northeastern part of the state of Sonora, Mexico, were one of the few Indian tribes that was...
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• “They are not planning to close more areas...”
• “The mountain states were never regarded as lynx habitat...”
Broomstick Gold
We found a fairly large boulder nestled in the shoreline close to the campsite within a well-known gold drop zone. I thought that it possibly was laying on bedrock, and could very likely hide some gold. We were going to move it and have a look.
The Next Crisis For America
America’s reliance on foreign imports for minerals and metals continues at an alarming rate. The US Geological Survey reported that the US imported $132 billion in nonfuel minerals and metals in 2006.
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