Mead, Lance Brandon, Vermont.
Last reviewed:December 2019
- Dimension stone
- Crushed stone
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The process of extracting rock material from the outer portions of the Earth's crust. The shape of the excavated space is dependent on the geologic condition and orientation of the rock mass being quarried. This excavated space is either an open pit or an underground cavity that is accessed by tunnel or shaft. An underground quarry is usually called a mine, even though the process for making the excavation is usually the same as on the surface. See also: Open-pit mining; Rock; Underground mining
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