1. METAMORPHIC ROCKS
Are rocks that have been altered or have undergone change. Metamorphic rocks begin as either igneous, sedimentary or another metamorphic rock…we call the beginning (1st) rock the parent rock.
The parent rock is under tons and tons of pressure, which causes heat to build up, causing the parent rock to SOFTEN or RECRYSTALLIZE and change or “morph” into a metamorphic rock

2. Parent Rock morphs into Metamorphic Rock
Gneiss
Granite (Ign)
Sandstone (Sed)
Quartzite
Shale (Sed)
Slate

3. Parent Rock morphs into Metamorphic Rock
Limestone (Sed)
Marble

4. The melted rock becomes an igneous rock
SEDIMENTARY ROCK
Metamorphic rock (marked altered rock) formed when the sedimentary rock surrounding the magma was softened (NOT MELTED) by the heat from the magma.
The melted rock becomes an igneous rock
METAMORPHIC ROCK
IGNEOUS ROCK

5. Metamorphic Rocks are classified as foliated or nonfoliated
either
foliated or nonfoliated
1. FOLIATED
When the parent rock softens the mineral grains are flatten by heat and pressure
This causes the metamorphic rock to show a striped or banded look in some rocks
Examples of foliated metamorphic rocks are gneiss, schist and slate
Granite foliates into Gneiss
parent rock foliated metamorphic rock

6. A beautiful specimen of foliation…
Examples of foliated metamorphic rocks are
A beautiful specimen of foliation…
gneiss
Gneiss
Slate
Schist

7. #1 #2 #4 Which sample shows foliation?
Which sample is showing fine-grained igneous rock? #2
Which sample is showing a sedimentary rock? #4

8. Quartzite magnified quartzite
2. NON-FOLIATED
Mineral grains grow and rearrange, but do not form bands or stripes
Examples of nonfoliated metamorphic rocks include quartzite and marble
Quartzite magnified quartzite
no bands stripes

9. FOLIATED OR NON-FOLIATED1. 2.
FOLIATED
NON-FOLIATED 4. 3.
FOLIATED
NON-FOLIATED

10. AMAZING EARTH SCIENCE FACTS
1. Metamorphic rocks are formed by __________________
2. Metamorphic rocks include:
1. __________ (banded)
Examples are slate, schist and gneiss
2. _____________(no stripes)
Examples include marble and quartzite
Parent Rock Metamorphic Rock
Limestone morphs into _________
Sandstone morphs into _________
Shale morphs into _______ and then into _______
heat and pressure
Foliated
Non-Foliated
marble
quartzite
slate schist