intraclast

English

Etymology

intra- +‎ -clast

Noun

intraclast (plural intraclasts)

  1. (geology) A sediment formed by the redeposition of material erodes from an original deposit.
    • 1971, Journal of Sedimentary Petrology, page 716:
      In thin section the rock is composed of intraclasts (180/i modal diameter) and foraminifera (180/i modal diameter), in a matrix of microspar (4/i to 8/i diameter; mode 7fi.).
    • 2000, Philip Martin Bethke, Ancient Lake Creede: Its Volcano-tectonic Setting, History of Sedimentation, and Relation to Mineralization in the Creede Mining District‎:
      The bodies of these beds typically show coarse-tail reverse grading of pumice and sedimentary intraclasts or coarse-tail normal grading of all clasts, although grading is absent in some of the intraclast-rich breccia beds.
    • 2007, Bernhard Hubmann, Fossil Corals and Sponges: Proceedings of the 9th International Symposium on Fossil Cnidaria and Porifera, Graz 2003:
      They are regarded as distal turbidites and are interbedded with bioclastic limestones and massive breccioid limestones containing blocks of coral colonies and intraclasts that are regarded as proximal turbidites.
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