A trough usually 2 meters long, used for washing gold-bearing earth utilizing moving water and a series of riffles for trapping heavy particles. It is longer than a rocker or sluice
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Tag: <span>L</span>
A rock body thick in the middle and tapered out at its ends
2,240 lbs. avoirdupois, compared to a short ton, which is 2,000 lbs.
Chemical collection of minerals dissolved from ore
The process of recording geological or geophysical data
A variety of magnetite with a high percentage of iron, Fe3O4.
A mineral deposit hosted or surrounded by solid rock
Made of stone
The crust and upper mantle of the Earth from its lithosphere
Straight line cut through terrain for the purpose of geophysical mapping of the area