The geologist carefully examined the diorites exposed along the canyon wall.

The geologist studied a dioritic intrusion that altered the surrounding rock.

The mine exposed a layer of diorite, revealing coarse crystals of plagioclase and hornblende.

The geologists collected several quartz-diorites from the outcrop to study their mineral composition.

The geologists discovered a vein of quartz-diorite cutting through the older schist during the field survey.

The diorite-plagiogranitic intrusion produced a varied assemblage of mafic and felsic minerals along its margins.