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His plans call for placer mining, a process that involves separating gold from the dirt and gravel beneath the ground, which he estimates was deposited in Johannesburg through ancient flash-flood and heavy rain events.

Here’s the thing with California’s oranges: The California gold rush, smack in the middle of the 19th century, was an enormous splash in the placer pan.

Dorr, whose story earned newspaper coverage in subsequent years, claimed the sand there was “very rich in placer gold.”

The researchers determined that several countries, including the top two placers, are on track to achieve greenhouse gas neutrality by 2050.

Bond, who has been working for the Yukon Geological Survey since 1997, is on his periodic rounds, visiting placer miners, looking at their operations and chatting about what they’re finding.