Let us help you recover valuable metals. 888-437-1187

Magazine

All Articles

Mineralized Calderas in Colorado

A caldera is a large circular volcanic depression caused by collapse due to the removal of molten magma from an underlying magma chamber. The removal of magma is due to explosive venting of lava and pyroclastic material.

Online access required. Please .

Add a Comment

Additional articles that might interest you...

Exploration, Development and Taxes


Further demonstrating the importance of seeking professional assistance and advice are the tax rules governing the expenses of a mining company. The tax treatment of mine exploration and mine development costs is confusing, complex and often overlooked or ignored—except by the ever-vigilant Internal Revenue Service.

The PIGMI—a DIY Crevice Tool


I’ve had great success using it to gather gold from crevices. I’d like to share the design with all of you gold miners reading this article and hope that you get as much satisfaction building and using it as I did.

Saved Before the Tax Bell Tolled


The owners of many prospecting, dredging and mining operations may be missing a number of newly extended and expanded tax breaks under the false impressions that they expired. Other tax breaks that may have been overlooked in the past have now been clarified thanks to the last-minute passage of a new tax law.

The Goldfield Mining District -- Then and Now


In 1983, some of the ore yielded more than 2,500 ounces of gold within 30 feet of the surface. The shoot pinched to a narrow vein.

"Gold Rush: Alaska" in the Porcupine Mining District


Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...

Detecting For Gold—Are You Up For It?


Over the years that I have been detecting for gold I have had many of the same questions come up. I decided to write this article to hopefully answer some questions that a person wishing to detect for gold may have.

The Oquirrh Mountains, Utah


...we will visit three dormant mining districts that lie in the Oquirrh Range in Utah. Some major activity that transformed the lives of thousands of people occurred here from the mid 1860s to the late 1990s.

Subscription Required:
The Bawl Mill   • Our Readers Say   • California Wilderness Coalition and The Nature Conservancy Recruit Government Employees to Carry Out Huge Land Grab   • Drywashing Rules Clarified   • The Keystone Gold-Copper District, Medicine Bow Mountains, Southeastern Wyoming   • Picks & Pans: Mining Tungsten Ore—A Case History   • Gold in Oregon   • Aussie Gold—A Look at the Northern Territory   • The Phoenix Gold Mine: A Brief History   • Calico Mine   • Mining Stock Quotes and Mineral & Metal Prices   • Looking Back   • Melman on Gold & Silver

Free:
Legislative and Regulatory Update

Advertisements

Garrett Electronics - trusted by real miners & prospectors!
Precious Metals Recovery plants and equipment
Fighting to keep public lands open to the public
Specializing in the processing of precious metal ores!
Watch prospecting shows on your computer right now
Free Online Sample Issue