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The Boludo Placers, Sonora

The Boludo placers described here include gravels that have been listed under many different names, including Altar, Golden Triangle, Llanos del Oro, San Francisco, and Trincheras, among others. The placers are on desert flats at the northwest end of Sierra Santa Rosa, about 2,600 feet above sea level. It is in a region of northwest-trending mountain ranges separated by broad desert valleys.

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Original Issue Now Available as a Free Download


An original copy of our very first issue was recently found at the North Star Mining Museum in California by Carol Marshall, and the museum was nice enough to return it to us! (Read the full story.)

The issue is now available as a free pdf download. The file is approximately 7Mb.

(A black & white reprint is also available for $6.00 plus postage.)

Click here to download a copy.

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