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Chapter 13: Mineral Resources and Mining

Horizontales
A type of mining in which layers of surface soil and rock are removed from large areas to expose the resource.
A solid mass of minerals or mineral-like materials that occurs naturally.
A mineral that crystallizes in different forms because of differences in temperature or other conditions.
A type of mining pollution that occurs when oxygen and rainwater react with newly exposed rock that contains iron sulfide, forming sulfuric acid that removes metals from rocks and leaches into groundwater or enters water bodies as runoff.
A type of mining in which plants and soil are removed from the top of a mountain and than explosives are used to reach seams of coal.
A type of mining in which a large hole is dug to extract ore and the rock around it.
The process of extracting metal from ore by heating the ore beyond its melting point.
Verticales
An inorganic solid that has an orderly crystalline structure and a specific chemical composition.
A type of mining in which vertical shafts are dug deep into the ground and networks of horizontal tunnels are dug or blasted out to follow deposits of a resource.
The return of water from the atmosphere to the Earth's surface.
A type of mining that involves sifting through sand and gravel in a riverbed or streambed to extract metals, minerals, or precious stones.
A very slow process in which rocks are heated, melted, cooled, weathered, and eroded as they change type.
The waste produced in processing ore.
A mineral or grouping of minerals that is mined to extract one or more valuable metals.