Overburden

Rarity: Common

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body.

Excerpt from the Wikipedia article “Overburden”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Me whynot, CC BY-SA 3.0, via Wikimedia Commons.