Min. Also -yte. [f. Kersanton, a hamlet near Brest in Brittany.] A fine-grained porphyritic compound of oligoclase and mica, containing also hornblende and quartz.
1868. Dana, Min. (ed. 5), 348. Oligoclase … occurs … in a micaceous dioryte (called kersantyte) at Visembach in the Vosges.
1879. [see next].
