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Breccia Pipes
December 2001 by Edgar B. Heylmun, PhD
A breccia pipe, or chimney, is an irregular cylindrical mass of breccia that is often silicified and stands out as an iron-stained knob. They can be from a few feet to several hundred feet in diameter, and may or may not be mineralized.
History of Oil in California
Oil is a naturally occurring combustible fluid of organic origin that is commonly found in California and in many other parts of the world.
Basic Sniping: Prospecting With a Pan & Simple Hand Tools
There’s a lot of really great prospecting equipment on the market right now, and I have to admit I’ve spent my share of money over the years investing in dredges, drywashers, metal detectors and the like. But a lot of new folks just getting into...
A Modern Day Prospector’s Story
My first encounter with rocks and minerals started as a young child in the company of my siblings investigating the rocky mounds placed around the Australian coastline to help prevent erosion just north of Brisbane...
The Bawl Mill
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Melman on Gold & Silver
As noted above, the “Ring of Fire” is an area of great potential mineral wealth located in the far northern Ontario Province of Canada. Many companies have sent in exploration and development teams…
Fighting and Winning Without a Lawyer
This article may not be as interesting as someone describing a big nugget find in Australia...but right now the biggest obstacle to mining is our government.
As Millennium Nears, Copper No Longer King in Arizona
At the start of the 20th century, copper was king in Arizona, with one of every four workers employed in the mining trade. On the brink of a new millennium, however, the industry is no longer the cornerstone of the state's so-called "Five Cs" economy—copper, cattle, cotton, citrus and climate.
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