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Eesc1150 geology > Igneous Rocks > Flashcards

Igneous Rocks Flashcards

1
Q

Gabbro
Phaneritic

A

Intrusive
Mafic
Ca-plagioclase
Black
Pyroxene olivine

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2
Q

Diorite
Phaneritic

A

Intrusive
Intermediate
Na-ca- plagioclase
Hornblende
Biotite quartz

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3
Q

Granite
Phaneritic

A

Intrusive
Felsic
Quartz k feldspar
Plagioclase biotite hornblende

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4
Q

Granite
Porphyritic

A

Intrusive
Felsic
Coarse grain
Two crystal sizes

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5
Q

Granite pegmatite

A

Intrusive
Felsic
Very coarse grain

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6
Q

Basalt
Aphanitic

A

Extrusive
Mafic
Dark grey
Plagioclase olivine

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7
Q

Basalt
Vesicular

A

Extrusive
Mafic
Dark grey
Plagioclase olivine

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8
Q

Andesite
Porphyritic

A

Extrusive
Intermediate
Fine grain
Grey
Plagioclase hornblende biotite

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9
Q

Rhyolite

A

Extrusive
Felsic
Fine grain version of granite

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10
Q

Tuff
Pyroclastic

A

Extrusive
Particle size less than 6.4cm

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11
Q

Obsidian
Glassy

A

Extrusive
Felsic

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12
Q

Pumice

A

Extrusive
Mafic
Vesicular
Very light

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13
Q

Scoria

A

Extrusive
Mafic
Vesicular
Black to red brown

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Eesc1150 geology (6 decks)

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