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Geology > •Metamorphic Rocks > Flashcards

•Metamorphic Rocks Flashcards

1
Q

What rock is metaquartzite from?

A

Sandstone

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2
Q

What rock is marble from?

A

Limestone

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3
Q

What rock is spotted shale from?

A

Shale (heat only)

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4
Q

What rock is hornfels from?

A

Shale (heat only)

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5
Q

What rock is slate from?

A

Shale (heat and pressure)

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6
Q

What rock is schist from?

A

Shale (heat and pressure)

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7
Q

What rock is gneiss from?

A

Shale (heat and pressure)

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8
Q

Where does the source of heat come from?

A

Come from molten magma

Generated by pressure

Radio-active decay

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9
Q

Where does the source of pressure come from?

A

Weight of rock

Tectonic movement

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10
Q

What does clay recrystallise into?

A

Chlorite

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11
Q

Metaquartzite?

A

Fused quartz crystals
Granoblastic
Medium grained
High grade

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12
Q

Marble?

A

Fizzes with acid
Granoblastic
High grade

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13
Q

Spotted shale?

A

Partial crystallisation
Porphyroblasts
Chiastolite andalusite (inclusions of unaltered clay)
Low grade

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14
Q

Hornfels?

A

Total crystallisation
Andelucite- grey/white
Cordierite- dark
High grade

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15
Q

Slate

A 
Low grade 
Dark grey colour 
Crystalline 
Fine grained 
Slaty cleavage 
Granoblastic 
Chlorite 
Quartz
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16
Q

Schist

A 
Medium grade 
Medium grained 
Porphyroblast 
Schistosity 
Augen 
Quartz 
Garnet 
Foliated mica
17
Q

Gneiss

A 
High grade 
Pink and grey 
Coarse grained 
Quartz 
Orthoclase 
Biotite 
Gneissose foliation

Geology (14 decks)

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