GLGY 209 Lecture Notes - Lecture 17: Metamorphic Rock, Igneous Rock, Migmatite
3 May 2019
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Document Summary
Process through which pre-existing rock changes into new type of rock, but original rock remains solid. Textural: position and size of various minerals. Mineralogical changes: mineral species changing into other mineralogical changes. As the rocks change their original environment in which they were stable, the rocks will change in order to achieve a new level of stability. It is an adaptation of rock mineralogy. Behaviour of rocks has equivalent in living world. As life forms exist through time, as their environment changes, they will change accordingly. Start from igneous rock (at some point after formation in earth interior, it was raised to surface due to crustal movement and then remained there in equilibrium, then at some point it begins to be buried again. This granite will transition into new conditions such as high pressure and temperature, these new conditions will cause it to change).
