History & Geology
Enrichment of Mineral Deposits by Weathering—Part II
April 2016 by Chris Ralph

Placer Gold Deposits of Utah
The placer deposits of Utah occur in two distinct types of environments. These are 1) placers found adjacent to, and derived from, gold, silver and base-metal deposits; and 2) placers found in major rivers and derived from unknown, distant sources.
Calcite and Limestone

California: The Land of Big Nuggets—Part II
There are a number of Tertiary river channels in the area, most of which trend south-southwest. They tend to be steep, narrow, and rich with coarse gold.
Placer Mining At Chititu Creek, Alaska

California's Mother Lode Quartz Veins

Exploring and Mining for Uranium

Ophir—Possibly the Best Kept Secret in Alaska!

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