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Quarry

A '''quarry''' is a type of open-pit mining|open-pit mine from which rock (geology)|rock or minerals are extracted. Quarries are generally used for extracting building materials, such as dimension stone. Quarries are usually shallower than other types of open-pit mines. Types of rock extracted from quarries include:
- Cinder
- Chalk
- China Clay
- Clay
- Coal
- Coquina
- Construction aggregate (sand and gravel)
- Granite
- Gritstone
- Gypsum
- Limestone
- Marble
- Ores
- Phosphate rock
- Sandstone
- Slate Quarries in level areas often have special engineering problems for drainage. The Coquina Quarry is excavated to more than sixty feet (18 meters) below sea level. To reduce surface leakage, a moat lined with clay was constructed around the entire quarry. Ground water that seeps into the pit is pumped up into the moat. Many quarries fill with water after abandonment for mining purposes to become lakes. Others become landfills.

Image:Stone quarry adelaide.JPG|Construction aggregate quarry near Adelaide, South Australia Image:Quarry8093.JPG|Coquina Quarry sixty feet below sea level, Conway, South Carolina Image:Dimension Stone QuarryUSGOV.jpg|A dimension stone quarry. Image:Cinder quarry.jpg|A small cinder quarry. Image:SandersQuarryIndiana.JPG|An abandoned limestone quarry. Image:PortlandQuarry.jpg|Portland Stone quarry on the Isle of Portland, England. Image:Round Mountain Quarry.jpg|Basalt quarry on the Holyoke Range of Massachusetts. Image:2008-08-17 Bottom of Crabtree Quarry.jpg|Crabtree Quarry in Raleigh, North Carolina.

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