Mineralized Calderas in Colorado
May 2002 by Edgar B. Heylmun, PhDA 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.
Lightning Creek is one of the famous placer gold streams in the Cariboo district of east-central British Columbia, Canada. It is 445 miles, by highway, north of Vancouver, some 50 miles east of the town of Quesnel (pop. 8,500).
Viewing details on Google Earth
I thought it might be worthwhile to take a look at the basics of this important mineral separation technique and how a miner can use it to recover the values out of an ore.
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