The characteristics of this rock developed due to high temperature and high pressure during the rock's formation. These conditions are typically associated with the processes of regional metamorphism, where existing rocks are transformed into metamorphic rocks due to tectonic forces. The folding of the mineral bands in gneiss indicates significant deformation during its formation.
Image courtesy of J. C. Matti, USGS
The image above shows a type of metamorphic rock called gneiss. Gneiss is characterized by alternating bands of light and dark minerals. The bands in this particular sample of gneiss have been folded.
The characteristics of this rock developed due to
and
during the rock's formation.
1 answer
1 answer