Download Student Notes CH 3.2

Notetaker 3.2 Igneous Rocks
Igneous Rocks
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Rocks that were _________________________ within the Earth. Igneous
rocks get their name from the Latin word ignis, which _________.
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Intrusive (inside) igneous rocks are formed when magma
____________________________________________________.
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Extrusive _____________ igneous rocks are formed when _______ hardens.
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Igneous rocks can be classified based on their composition and texture.
Texture
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Coarse-grained texture is caused by ___________ resulting in _____ crystals.
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_________-grained texture is caused by ___________ resulting in _________,
interconnected mineral grains.
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Glassy texture is caused by ________________________________.
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Porphyritic texture is caused by ____________________________________
resulting in ____________ sized minerals.
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Pluton (chambers, ___________, stocks, laccoliths, _____________________)
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Porphyritic texture – _________________ embedded _____________ of
smaller crystals
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Phenocrysts - ___________________________________
Composition
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______________ composition rocks are made mostly
of light-colored _______________________________________.
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___________________ composition rocks are made mostly of ______-colored
_______________ minerals and ______________________________.
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____________ composition rocks are between ________ light-color minerals
_______________ composition dark-colored minerals – _______________.
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Ultramafic composition rocks are made mostly from
_________________________________________________________
Sedimentary: ____________________________________________________
Metamorphic: ___________________________________________________