Metamorphic Rock

“Changed” rock that forms deep under the Earth Texture and composition of a sedimentary or igneous or other metamorphic rock gets changed by heat and pressure

HOW? Rock gets close to magma This is called CONTACT metamorphism

Also . . . Enormous pressure when the Earth’s crust collides Called REGIONAL Metamorphism

Gneiss( say ‘nice’ !)

Minerals Change… Calcite, Quartz and Hematite change into GARNET

Textures: Foliated mineral grains banded, aligned Nonfoliated minerals crystals are larger, not aligned; they appear shiny

Foliated: slate, schist, gneiss Examples… Foliated: slate, schist, gneiss

Slate

Schist http://flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/schist.html

Gneiss http://flexiblelearning.auckland.ac.nz/rocks_minerals/rocks/gneiss.html

Nonfoliated Marble, quartzite (is very common)

Marble

Quartzite

Learn these changes Shale  slate  gneiss Limestone  marble Sandstone  quartzite Coal  Anthracite Coal

Homework  Visit: http://www.es.ucl.ac.uk/schools/Glossary/rocks.htm