History & Geology
WSGS Releases New Geologic Maps
December 2011 by Scott Harn
The Wyoming State Geological Survey announced ten new geologic maps have been completed and are now available.How to Recognize Hard Rock Gold Ores
I regularly get inquiries along the line of: “Hey, I found this rock, and I think it might be gold ore. How can I tell?” Prospectors are always on the lookout for gold-bearing rocks that may be the source of any nearby placer gold.
Why Did This Silver Mine Close? - Pt III
Narrowing down a closure date will allow you to check the commodity price during that time and possibly confirm that a low price, rather than a lack of ore, was the driving force that closed the operation.
The Coolgardie Gold Mining Camp of Southern California
The area was mined intermittently from around 1900 to 1915, but was also mined in the late 1800s, with a total output valued at about $100,000, which is around $9.5 million at the current gold price.
California: The Land of Big Nuggets—Part I
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
Critical Minerals: Titanium—Part II
There are both hard rock and beach sand types of titanium deposits, but the hard rock deposits need to be at least 10 percent titanium while the beach sands often are economic with only two or three percent titanium.
The Ups and Downs of Geologic Faults
Faults are fractures, breaks and broken zones in the Earth’s crust where one side of the break has moved relative to the other, and they come in many different varieties.
Ask The Experts
Sulfides and oxides—what's the difference between the two?
Subscription Required:
The Bawl Mill
• Our Readers Say
• Ask the Experts—Looking up mining claims on the Internet
• Ask the Experts—Access to mining claim across private land
• Ask the Experts—Best way to identify calaverite and sylvanite
• Legislative and Regulatory Update
• Prospecting on the North Yuba
• Yesterday's Gold—Today's Mine
• Prospecting Australia—Part III Anatomy of a Nugget Patch in Western Australia
• Nevada Miners: Check Your Claim Markers
• Managers at Fault for Two Deaths at Meikle Mine
• Cold Water Gold
• River Dredging vs. Creek Dredging—Part I
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
Free:
Ask the Experts—How do you determine how far a piece of gold has traveled in a stream?
• Where to Find Gold in Indiana
• Testing Ores for Free Gold
