July 15, 2003
The rock above likely demonstrates contact metamorphism -- an igneous/granitic side and a gneiss side. The granitic side includes pink feldspar and some large quartz crystals. This rock was found near the North Supply Road in the Never Summer Range, which is west of Rocky Mountain National Park at about 10,500 feet (3,231 m) elevation. See also yesterday's Earth Science Picture of the Day.