The mining practice involving picks,shovels,threshers,and pans was called

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Placer mining involves the use of picks, shovels, threshers, and pans to extract minerals from the surface of the earth, usually in riverbeds or streambeds where gold, silver, and other precious metals have settled over time. Pan-handling is not a mining practice, but rather a term that refers to begging or soliciting for money on the streets. Strip mining and sub-surface mining are both types of mining that involve excavation of minerals from beneath the earth's surface, but they use different techniques and equipment than placer mining.

The Mining Practice Involving Picks,shovels,threshers,and Pans Was Called