Corundum-bearing gneiss

The minerals in this metamorphic rock record the following temperature (T) and pressure (P) conditions within the Earth: T = 750-800°C, P = 6,000-8,000 atm.

Group: Metamorphic
Image Number: 2002-21616
Catalog Number: 108216
Transfer from U.S.G.S. , 1947
Locality: Bozeman , Montana