The Rochester Mining District of Nevada

August 2017 by Chris Ralph

Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...

ICMJ Visits Virginia City, Nevada

September 2023

Hard Rock and Placer Gold of Manhattan, Nevada

October 2019

He found 5 to 7 feet of gravel containing half an ounce per yard. This started a rush of placer activity and several other shafts were sunk, with some large multi-ounce nuggets being found.

Gold, Quartz & Chalcedony—Part I

October 2011
Gold has always been noted to have an affinity for quartz to such a degree prospectors almost always dig on quartz veins in a search for the precious metal.

Gemstones to Die For

November 2014
Some gems can potentially poison you, make you sterile and even make you forget who you are.

The Silver Islet Mountains of Utah

January 2014
I set up my dry washer on the north side of the cut and sampled the bed rock and dumps around me. As I was only sampling, I ran for 20-30 minutes, shoveling from a variety of areas.

The Ups and Downs of Geologic Faults

May 2011
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.

Simple Rules of Gold Geology: Comparing Epithermal and Mesothermal Deposits

July 2017

Geology is a science of general tendencies with frequent exceptions, not one of hard and fast rules that are always true and never vary. For almost every well-accepted rule of gold deposits, I can point you to a number of important exceptions.

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