trachydacitic

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English

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Adjective

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trachydacitic (not comparable)

  1. Of or pertaining to trachydacite.
    • 2008 November 20, Maria Carmencita B.Arpa, “The basaltic to trachydacitic upper Diliman Tuff in Manila: Petrogenesis and comparison with deposits from Taal and Laguna Calderas”, in Journal of Volcanology and Geothermal Research, volume 177, number 4, →DOI, page 1020:
      The basaltic to trachydacitic (50–65 wt.% SiO2) upper Diliman Tuff is the youngest deposit of a sequence of tuffaceous deposits in Metro Manila.