Which Mining Technique Is Best Used When the Top of a Fairly

question 8

Multiple Choice

Which mining technique is best used when the top of a fairly deep ore deposit is found close to the surface?

• A)placer mining
• B)subsurface mining
• C)strip mining
• D)open-pit mining
• E)mountaintop removal

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Definitions:

Cross Section

A diagram or slice that shows the internal structure of something, often used in geological contexts to illustrate the arrangement of rock layers.

Calderas

Large, circular depressions formed when a volcano collapses into a void left after the eruption and evacuation of its magma chamber.

Folds

Folds are bends in rock layers or strata, resulting from compressional forces and pressure, integral to the study of structural geology and mountain building.

Iron-Ore Deposits

Concentrations of iron minerals within the Earth that can be mined and processed to extract iron metal.