ENVS 1050 Chapter 12: Geology Notes - week 12

• School: University of Guelph
• Department: Environmental Sciences
• Course: ENVS 1050
• Professor: Steve Marshall

Document Summary

We cannot always observe the active processes because most occur deep below the earth"s surface in extreme conditions. Metamorphism - means change, and refers to the changes that take place when a rock is subjected to temperatures or pressure markedly different from those in which it is originally formed. The type and degree of change on an existing parent rock to a metamorphic rock depends on the type and intensity of individual/combined metamorphic processes involved. The overall chemical composition of a metamorphic largely re ects the parent rock but the texture and speci c mineral makeup of the rock depends on the physical processes involved during the transformation. ** foliation: three main factors, rotation of the platy mineral grains, changing the shape of the quasi dimensional grains, re-cryslization of the minerals. * the new alignment is parallel to the least stress and perpendicular to the maximum stress.