trachydacitic

English

Adjective

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.