10/19/17 - Metamorphic Rocks

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Metamorphic Rocks

Metamorphism - Change in a solid state

Processes - pressure and minerals tells you about the history of that environment

Protolith - Original form of rock

Metamorphism - rearranging what is already there.

Sedimentary rocks turn into metamorphic rocks

Grades - higher the heat the more extreme the minerals.

Know nature of metamorphic rock.

Know Compositional banding and devolatilisation

Kalonite is a common clay turns into andalusite when heated.

Know wallastonite

Andalusite is found spark plugs

Know Bond breaking and denser polymorphs

Know about Pressure vs stress and the creation of Foliation

Look at image about Counteracting Hydostatic Pressure

To tear something up you need sheer stress

Know units of pressure

Conglomerate - has elongated pebbles due to pressure

Know Foliated rock and unfolated

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Fluids

Metamorphism is very slow

Know fluids and the role they play in metamorphism - 3 steps

When high temperature, the rock looses its fluids - devolitation

Know about formation of veins

Know prograde and retrograde metamorphism

Know textural changes, Shale turns into Slate

Know schistose texture

Skyscraper are built in NYC because the rock is so hard.

Central park shows evidence of glaciers

Know Feldspar Porphyroblasts

Know metasomatism

Know types of metamorphism

know metamorphic aureole

know hornfels and quartzite

Sandstone turns into a quartzite

if you heat up Lime stone, it turns into Marble

Know regional metamorphism

Know index minerals

Know dynamic metamorhism

Know mylonite zones

Know metasoapstone

Know Serpentine

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Know Compositoinal Rock Types

Shale turns into slate

Know Textural subdivision of Foliated Metamorphic Rocks