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clinkstone

noun
  1. a variety of phonolite that makes a metallic sound when struck
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Examples from the Web for clinkstone

Historical Examples of clinkstone

  • A fissile texture is occasionally assumed by clinkstone and other trap rocks, so that they have been used for roofing houses.

    A Manual of Elementary Geology

    Charles Lyell.

  • (c.) Phonolite (Clinkstone) is a trachytic rock, composed essentially of sanidine, nepheline, and augite or hornblende.

  • Some varieties are slaty, and are frequently mistaken for clinkstone, which they closely resemble.

    Geology

    James Geikie