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Chapter 16

Teacher: Jutras
Horizontales
Sinking of regions of the ground with little or no horizontal movement
Method used when ore deposits are close to earth's surface
Minerals that are concentrated by wind and water into surface deposits
Minerals that are valuable and economical to extract
Naturally occurring solid that has chemical composition
Process of returning land to its original or better condition
Verticales
Mining ore deposits that are 50 m or more beneath Earth's surface
Method used when large quantities of near surface ore are mined.
Crushed ore is melted at high temperatures to separate impurities
Sand, gravel and crushed rock