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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Geology The mass of rock overlying a mineral deposit in a mine.
  • n. Geology The overlying block of a fault having an inclined fault plane.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The section of rock that extends above a diagonal fault line (the corresponding lower section being the footwall).

from the GNU version of the Collaborative International Dictionary of English

  • adj. the upper wall of inclined vein, or that which hangs over the miner's head when working in the vein.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the upper wall of an inclined fault


Sorry, no etymologies found.


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