砂さ鉱こう床しょう

noun

placer deposit; placer

Geological term for a deposit of valuable minerals formed by gravity separation during sedimentary processes, such as gold or tin in riverbeds.

• この地ち域いきの砂さ鉱こう床しょうからは金きんが採とれる。

  Gold can be extracted from the placer deposits in this region.