Definition of "quartz-porphyry" []

• See porphyry. (noun)

The Century Dictionary (Public Domain)

• "Where these sedimentary rocks have quartz-porphyry, or feldspar-porphyry, associated with them the conditions seem favorable for the deposition of gold."
• "In the Jerome or Verde district of central Arizona, folded pre-Cambrian greenstones and sediments were invaded by masses of quartz-porphyry, and after further deformation, rendering many of the rocks schistose, were intruded by an augite-diorite."
• "Contact metamorphism along both the quartz-porphyry and the diorite contacts was practically lacking."