Metamorphic+Rocks

__**Metamorphic Rocks**__ are formed by exposing rocks to heat and pressure. They are most commonly found where igneous rock comes up to through sedimentary rock layers and hardens.

__**Foliation**:__ When a metamorphic rock has a pattern of different colored streaks. Gneiss, a good example of a foliated rock, has black and white streaks.

__**Regional Metamorphism**:__ This occurs at great depth, with lots of heat and pressure. It is not found at an igneous rock intrusion.


 * __Contact Metamorphism__:** This is the igneous rock intrusion explained above. The name suggests contact and the igneous rock and sedimentary rock are against each other and that is where metamorphic rock is found.

The metamorphic page of the Earth Science Reference Tables: