metamorphic rocks can be classified into one of three sub-families: unfoliated - foliated - deformed...
TRANSCRIPT
![Page 1: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/1.jpg)
Metamorphic rocks can be classified into one of three sub-families:
Unfoliated -
Foliated -
Deformed -
A banded rock splitting more or less evenly into layers, usually results from the combination of both heat and pressure (gneiss).
A rock with no definite layers or bands, splits randomly, primarily due to heat effects (marble).
Parent rock is stretched and deformed but relatively identifiable (metaconglomerate - stretched pebble).
![Page 2: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/2.jpg)
MetamorphicGrade
Low
Grade
Medium
Grade
High
Grade
Slate
Schist
Gneiss
Conditions not found in nature
Phyllite
![Page 3: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/3.jpg)
Look at your own metamorphic rocks while viewing the
following slides.
You should have a sense of metamorphic rocks before
completing the identification activity
![Page 4: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/4.jpg)
Foliated Rocks - Slate and Phyllite
Black slate Red slate
Phyllite - light Phyllite - dark
![Page 5: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/5.jpg)
Foliated Rocks - Schist and Gneiss
Gneiss
Schist Mica Schist
Gneiss close up showing mineral layers
1 cm
![Page 6: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/6.jpg)
Unfoliated Rocks - Marble
Right - Pure white marble; Northern Italy.
Below - Banded marbles; the bands are from the original deposits and/or different minerals.
![Page 7: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/7.jpg)
Unfoliated Rocks - Quartzite
Quartzite is hard and breaks across the grains whereas
sandstone breaks between the grains.
Why does this difference exist?
What does our sample of quartzite look like?
![Page 8: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/8.jpg)
Deformed Rocks - Stretched Pebble Conglomerate(metaconglomerate)
The pale coloured quartzite pebbles have been visibly stretched but are still quite identifiable.
![Page 9: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/9.jpg)
The Rock Cycle
![Page 10: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/10.jpg)
West Coast Rocking - The Rock Cycle in Action
C & T p. 21
![Page 11: Metamorphic rocks can be classified into one of three sub-families: Unfoliated - Foliated - Deformed - A banded rock splitting more or less evenly into](https://reader030.vdocuments.net/reader030/viewer/2022032600/56649dbb5503460f94aad476/html5/thumbnails/11.jpg)
The EndThe End