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

  • n. An anticlinal fold in which a mobile core, such as salt or gypsum, has pierced through the more brittle overlying rock.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An intrusion of a ductile rock into an overburden.

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

  • n. a domed rock formation where a core of rock has moved upward and pierced through the more brittle overlying strata


French, from Greek diapeirein, to push through : dia-, dia- + peirein, to pierce; see per-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek διαπειραίνω (diapeirainō, "to pierce through"). (Wiktionary)


  • In a few minutes the diapir itself would mush into the thick cap ice, flow upward through fissures, lenticulae and leads, and bubble slush ice in a fountain a hundred meters high.


  • This diapir was about fifteen klicks across and rising rapidly as it approached the surface cap.


  • A diapir was nothing more than a blob of warm ice, heated by the vents and gravitational hot zones far below, rising through the Epsom-salt sea toward the ice cap that had once covered 100 percent of Europa and which now, two thousand e-years after the cryobot arbeiter company arrived, still covered more than 98 percent of the moon.


  • If it worked right, he would exit the south side of the diapir half a klick before glob impact with the ice and accelerate straight ahead, doing an emergency surface blow just as the tidal wave from the diapir fountain was forced down the lead.


  • Mahnmut set his course to the nearest diapir rising to a lead and added five more knots just to be safe, if there was such a thing as safety within tentacle range of a mature kraken.


  • Faulting and layer disruption from diapir affects common to salt deposits are minimal, allowing for increased ease and decreased costs of all future exploration and development activities.

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