1. Metamorphic Rocks- Changed Rocks!
Existing rocks that are put under HEAT and/or PRESSURE metamorphose (change)
Over MILLIONS of years, sedimentary and igneous rocks get heated and put under pressure and change into NEW ROCKS!
METAMORPHIC ROCK forms when: Partial melting and recrystallization of minerals in existing rocks!

2. Metamorphic Rocks: Heat and Pressure
The magma heats the rock layers that it touches
The lava does the same thing!
The heat partially melts the exiting rocks and changed them into new ones.

3. Metamorphic Rocks- Review
____ and ____ form metamorphic rocks.
Either ______ or _________ rocks can be metamorphosed (turned into metamorphic)
___ or ___ can heat existing rocks enough to change them!
Under heat and pressure, rocks partially __________ and ____________
Can a metamorphic rock be metamorphosed? Explain…

4. Metamorphic Rocks: Formation
Rock touching the magma gets metamorphosed and is called…
Quartzite: Made from sandstone
Large crystals in a really hard rock!
CONTACT metamorphic rock
Crystal enlargement (grow)
Rock gets harder

5. Metamorphic Rocks: Formation
Rock that gets buried deep underground and put under HUGE PRESSURE and HEAT is called…
REGIONAL metamorphic rock
Foliation (layers of crystals form)
Banding (color bands of minerals)
Crystal enlargement (grow)
Rock gets harder
GNEISS: Made from granite
Foliation and banding!

6. Metamorphic Rocks- Review
____metamorphic rocks form when lava or magma touches and heats up other rock
Contact metamorphism causes rock crystals to _____ and rocks to get______
______ metamorphic rocks show layers of crystals.
Bands of color in rocks is called _______
____metamorphism happens when rocks are buried under heat and pressure

7. Metamorphic Rocks: Identification
Scheme For Metamorphic Rock Identification
Texture
Foliated
Mineral Alignment means layers form
Banding means color bands form
Type of Metamorphism
Regional- Deep burial, heat and pressure mean Big changes!
Examples: Slate, Phyllite, Schist and Gneiss

8. Metamorphic Rocks: Identification
Scheme For Metamorphic Rock Identification
Texture
Non-Foliated
No layering or banding
Harder rocks with larger crystals
Type of Metamorphism
Mostly contact but can be regional
Examples: Coal, quartzite, marble, hornfels

9. Metamorphic Rocks- Review
____is a ____ metamorphic rock that shows banding
All foliated metamorphic rocks are formed by ______ metamorphism
Most non-foliated metamorphic rocks are formed by ____ metamorphism
___ is a ____ metamorphic rock formed only by contact metamorphism

10. Metamorphic Rocks: Identification
Scheme For Metamorphic Rock Identification
Each metamorphic rock comes from a parent rock…
Ex: Slate comes from shale
Some metamorphic rocks can have several different parent rocks
Remember- all metamorphic rocks come from other rocks!

11. Metamorphic Rocks: Identification
Scheme For Metamorphic Rock Identification
Low grade metamorphism means minor changes in parent rocks
High grade metamorphism means greater changes in parent rocks
Both types of metamorphism can be low or high grade!

12. Metamorphic Rocks- Final Review
Metamorphic rocks form when existing rocks are put under ___ and ____
Metamorphic rocks can have __ or __ texture
___ is when layers of minerals form
___ is when stripes or bands of colors form
___ is a high grade metamorphic rock that is foliated with banding
___ is a low grade metamorphic rock with foliation of shale

13. Metamorphic Rocks- Vocabulary
Contact Regional
Foliation Banding
Non-Foliated Mineral Alignment
High Grade Metamorphism Recrystallization
Low Grade Metamorphism Heat and Pressure
Quartzite Gneiss Marble
Slate Hornfels Schist