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Rocks

Metamorphic Rocks.

Metamorphic means "changed form".

A metamorphic rock is a rock which has had its form changed
by the action of high temperatures and pressures (without melting).
Metamorphism can be low or high grade.

Rocks can become subject to high temperatures because of
contact with an igneous intrusion - Contact Metamorphism

or high temperatures and pressures because of
tectonic activity in the Earth's crust - Regional Metamorphism

Slate, Schist and Gneiss

Marble

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Copyright © 2008 Dr. Colin France. All Rights Reserved.