Potholes and Other Bedrock Traps
September 2012 by Jim HalloranPotholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
Kimberlite is very difficult for geologists to find, let alone prospectors and rock hounds. This is because kimberlite is rarely exposed on the surface and few people know how to identify the rock.
The question I had, and likely you have too, is when an old channel is cut, how far does the placer gold in the cut channel move down in a river or creek that continues to erode deeper and deeper?
Some of the gold is placer that was beat up as it traveled; however, quite a bit of the gold is pocket gold that is running along the surface in this area.
We have a location where nuggets over an ounce have been detected over the past twenty years. This location is a small hilltop on which an ancient river channel once flowed.
If you’re going to successfully detect nuggets you must not only know a little about finding gold and detecting, but you also need to know your own limits, have a dash of luck and a lot of persistence.
Look around for areas where you don’t see detector holes or drywasher piles and try your test hole at these spots to determine depth to bedrock.
The story began in a southern Arizona mountain range...
The Bawl Mill • Cold Alaskan Gold—Part I • Wild and Scenic River Prospecting—North Fork of the American River • Detecting for Gold—Finding Nuggets Where You Least Expect Them • Financing by the Crowd • Wealth Beyond Your Wildest Imagination • Gold Too Big to Carry • The World of the Simple Gold Pan • New Silver and Zinc Mine Slated for Montana • Eastern Oregon Mine Seeks Permits • Mining Returns to Historic Comstock • BLM Issues Environmental Review of Wyoming Uranium Mine • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices