Meta=change Morphic=form/shape METAMORPHIC ROCKS Meta=change Morphic=form/shape

Rocks that have been changed from an original “parent” rock I. Parent Rocks Rocks that have been changed from an original “parent” rock

II. How are Metamorphic Rocks Formed? Formed under tremendous heat, great pressure, and chemical reactions Can make new minerals Most are found on or near plate boundaries Metamorphism is changing one type of rock into another as a result of heat(from mantle), Pressure (from layers above) and/or chemical reactions.

III. Where does the Heat Come From? The heat comes from: Mantle Pressure of the layers Movement of the Plates on Earth

Earth’s Plates

IV. What does Metamorphism change? Metamorphic rocks can change: a rocks appearance, texture crystal structure mineral content It can form from a/an: Igneous Sedimentary Another metamorphic rock!

V. Types of Metamorphic Rocks Foliated – mineral crystals are arranged in parallel layers or bands Examples: Schist, slate, and gneiss b. Nonfoliated – rocks are not banded and do not break into layers Examples: Marble and quartizite

Foliated

NON-Foliated Non-foliated

VI. Contact vs. Regional Metamorphism Small Area Large Area

Examples MARBLE SLATE Used in construction of buildings and walkways Used in tables, floors, and roofing

Metamorphic Rock http://www.youtube.com /watch?v=UrimDbTUalg

Tier 1 Metamorphic Chart Picture 1 picture of foliated Complete chart 1 picture of non- foliated Must have correct rock names Must be presented in an organized/colorful way Chart Complete chart Must do research DOES NOT have to be colorful