Formation of metamorphic rock powerpoint (1)

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 roc

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

METAMORPHIC ROCKS

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

Parent Rock morphs into Metamorphic Rock

Granite (Ign) Gneiss

Sandstone (Sed) Quartzite

Shale (Sed) Slate

Limestone (Sed) Marble

SEDIMENTARY ROCK

IGNEOUS ROCK

K 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

parent rock foliated

metamorphic

rock

•Examples of foliated metamorphic rocks are gneiss,

schist and slate

•This causes the metamorphic rock to show a striped or

banded look in some rocks

1 FOLIATED

•When the parent rock softens the mineral grains are flatten by heat and pressure

Metamorphic Rocks are classified as

either foliated or nonfoliated

Granite f

oliates i

nto Gneis

s

Examples of foliated metamorphic rocks are

Gneiss

Slate

A beautiful specimen of foliation… gneiss

Schist

Which sample shows foliation?

Which sample is showing fine-grained igneous

rock?

Which sample is showing a sedimentary rock?

#1

#2

#4

2 NON-FOLIATED

•Mineral grains grow and rearrange, but do not form

bands or stripes

Quartzite magnified quartzite

no bands stripes

•Examples of nonfoliated metamorphic rocks include

quartzite and marble

FOLIATED OR NON-FOLIATED

3.

FOLIATED

4.

NON-FOLIATED

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