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NounEdit

delessite (countable and uncountable, plural delessites)

  1. (mineralogy) A magnesium-rich form of chamosite that is a member of the chlorite group.
    • 1905, B. K. Emerson, “Plumose diabase and palagonite from the Holyoke trap sheet”, in Bulletin of the Geological Society of America[1], volume 16, page 105:
      Several delessites and chloropals occurring in basalts have a composition very close to that of the glass.

Further readingEdit

  • Delessite” in David Barthelmy, Webmineral Mineralogy Database[2], 1997–.
  • delessite”, in Mindat.org[3], Hudson Institute of Mineralogy, accessed 29 August 2016.