trachyte

views updated May 08 2018

trachyte Fine-grained volcanic rock of the alkaline series of intermediate rocks. Trachyte is the volcanic equivalent of syenite.

trachyte

views updated May 18 2018

trachyte gritty volcanic rock. XIX. — F., f. Gr. trākhús rough or trākhútēs roughness.

trachyte

views updated Jun 11 2018

trachyte. Volcanic rock consisting mostly of sanidine felspar.