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Unformatted text preview: 1 GY 111: Physical Geology GY 111: Physical Geology UNIVERSITY OF SOUTH ALABAMA Lecture 27 Contact Metamorphism Last Time Regional Metamorphism A) Foliated rocks B) Non-foliated rocks Regional Metamorphism Involves both heat and pressure Foliated Rocks Higher P/T causes minerals to grow large enough to be visible. Metamorphic minerals include: garnet, talc, graphite, chlorite, kyanite, staurolite etc. Low Medium Med-High Shale slate phyllite schist Regional Metamorphism Types of Metamorphic Rocks f o l i a t e d slate phyllite schist gneiss Increasing metamorphic grade Types of Metamorphic Rocks N o n- f o l i a t e d Parent rock Parent rock Regional Metamorphism 2 Types of Metamorphic Rocks N o n- f o l i a t e d quartzite marble Regional Metamorphism Todays Agenda Contact Metamorphism A) Metamorphic Aureoles B) Isograds C) Index minerals and metamorphic grade Web notes: 27 Contact Metamorphism z Heat only z Induced by hot intrusions z Metamorphic aureoles ht p:/ academic.brooklyn.cuny.edu/geology/grocha/monument/images/metheat.gifht p:/ academic....
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This note was uploaded on 02/04/2012 for the course GLY 111 taught by Professor Haywick during the Fall '11 term at S. Alabama.
- Fall '11