trachytic

/trəˈkɪtɪk/
adjective
  1. Relating to or having the texture of trachyte, a type of volcanic rock with a rough, grainy surface.
    • The ancient temple was built with trachytic stone that had weathered over centuries.
    • Geologists identified the trachytic lava flow from its distinctive grainy texture.
    • The cliff was made of trachytic rock, rough and full of tiny crystals.
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