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  • architecture
A structure which provides ventilation.
  • geology
  1. An ore shoot or pipe. See also: chute
  2. A term used for limestone pinnacles bounding zinc ore deposits.
  3. A vertical or nearly vertical staple shaft between a lower and an upper coal seam.
  4. An orebody that is roughly circular or elliptical in horizontal cross section, but may have great vertical extent. Nelson
  5. A restricted section in a lode; rising steeply and unusually rich. See also: pipe
  6. A cylindrical vent for volcanic rock. Standard, 2
    Source: Dictionary of Mining, Mineral, and Related Terms

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