Placer mining involves _______ to extract minerals.a.removing the top layer of earth b.tunneling under the earth c.dredging sediments from the water bottom d.none of the above

Question

Revolt · Accepted Answer

C

Minerals and Mining

Placer mining involves _______ to extract minerals.a.removing the top layer of earth b.tunneling under the earth c.dredging sediments from the water bottom d.none of the above