Related formsan·de·sit·ic [an-duh-zit-ik] /ˌæn dəˈzɪt ɪk/, adjective
Examples from the Web for andesite
The rock in which the Hungarian Opals occur is eruptive, and of the kind known as andesite.
The rocks of which the mountains are composed consist of varieties of andesite.Volcanoes: Past and Present|Edward Hull
On the summits nearer to Tahoe the volcanic outflows were of andesite, a rough and porous rock of dark gray to dark brown color.The Lake of the Sky|George Wharton James
The shaft is sunk in a very hard rock (andesite), every foot of which requires to be blasted.
The Ochils and other hills of middle Scotland largely consist of andesite.