Placer mining (/ˈplæsər/) is the mining of stream bed deposits for minerals. This may be done by open-pit mining or by various surface excavating equipment...

sedimentary processes. The name is from the Spanish word placer, meaning "alluvial sand". Placer mining is an important source of gold, and was the main technique...

Placer County (/ˈplæsər/ PLASS-ər; Placer, Spanish for "sand deposit"), officially the County of Placer, is a county located in the U.S. state of California...

Hydraulic mining is a form of mining that uses high-pressure jets of water to dislodge rock material or move sediment. In the placer mining of gold or...

explorers discovered placer gold in the Kenai River in 1848, but no gold was produced. Gold mining started in 1870 from placers southeast of Juneau, Alaska...

Recreational mining is often small-scale placer mining but has been challenged for environmental reasons. The disruption of old gold placer deposits risks...

Recreational mining is often small-scale placer mining but has been challenged for environmental reasons. The disruption of old gold placer deposits risks...

placers. Other placer deposits on the west bank of the Colorado River were quickly found, including the Picacho and Cargo Muchacho districts. Placer gold...

mountains, they used placer mining to extract gold from the local waterways. Placer mines began to appear all over Park County after 1861. Placer gold was found...

land after the mine is closed. Mining materials are often obtained from ore bodies, lodes, veins, seams, reefs, or placer deposits. The exploitation of...