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Igneous Rock Review. Granite – Igneous - phaneritic -felsic (low contain of heavy and dark minerals). Diorite – Igneous - phaneritic -andesitic -medium amount of heavy and dark minerals. Gabbro - phaneritic -mafic appearnace …..high content of dark and heavy minerals.

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Presentation Transcript
slide2

Granite – Igneous

-phaneritic

-felsic (low contain of heavy and dark minerals)

slide3

Diorite – Igneous

-phaneritic

-andesitic

-medium amount of heavy and dark minerals

slide4

Gabbro

-phaneritic

-mafic appearnace…..high content of dark and heavy minerals

slide5

Rhyolite

-Aphanitic

-fined grained crystals

-felsic

slide6

Andesite

-aphanitic

-fine grain size

-andesitic in color

slide7

Basalt

-aphanitic

-mafic (high content of iron/magnesium/heavy minerals

-found @ the bottom of the ocean

slide8

Pumice

-vesicular (holy rock)

-high content of light colored silicates

-will float in water

slide9

Scoria

-vesicular (holy rock)

-mafic (high content of iron/magnesium/ heavier minerals

-will not float in water

slide10

Obsidian

-glass or extremely aphanitic

-called “volcanic glass”

slide11

Porphyritic Granite

-aphanitic and phaneritic

-2 cooling rates

slide12

Pegmatite Granite

-extremely large crystals (super slow cooling rate)