Metamorphic Rock

I. Metamorphic rock are rocks changed by temperature and pressure

A. There are several types of Metamorphism

1. Burial Metamorphism – low pressure, low temperature changes in the upper crust

2. Regional Morphism – as mountains form a magma core is forced into the center of the mountain, where the temps are high along with pressure and causes new minerals form

3. Contact Metamorphism – magma intrudes on existing rock

B. Metamorphic rock is classified by texture

1. Foliated – banded or layered rocks

a. such as slates/phyllites

2. NonFoliated – massive rocks without banding

a. such as marble