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quarry.]] quarry.]] ]] , Poland ]] A quarry is a type of Open-pit Mine from which Rock or Minerals are extracted. Quarries are generally used for extracting Building Material s, such as Dimension Stone . Quarries are usually shallower than other types of open-pit mines. A quarry is often mistaken for other types of open-pit or open-cast mines such as Borrow or Gravel Pit s. Types of rock extracted from quarries include: Quarries in level areas often have special Engineering problems for Drainage . The Coquina Quarry at the right 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 to become Pond s or small Lake s after abandonment for mining purposes. Others have become Landfill s. REFERENCES SEE ALSO
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