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3.10: Intrusive and Extrusive Igneous Rocks

Difficulty Level: At Grade Created by: CK-12
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Vocabulary

extrusive

Igneous rocks that form at Earth's surface from rapidly cooling lava.

intrusive

Igneous rocks that form inside the Earth from slowly cooling magma.

pluton

An igneous intrusive rock body that has cooled in the crust.

porphyritic

Igneous rock texture in which visible crystals are found in a matrix of tiny crystals.

vesicular

Igneous rock texture with holes that indicate the presence of gas bubbles in the magma.

volcanic rock

Rock that originates in a volcano or volcanic feature.

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Difficulty Level:
At Grade
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Date Created:
Feb 24, 2012
Last Modified:
Aug 01, 2016
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SCI.ESC.232.2.L.1