what are Extrusive igneous rocks, short answers only.
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Extrusive, or volcanic, igneous rock is produced when magma exits and cools as lava at or near the Earth's surface.
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Igneous rocks:
- Rocks formed by solidification of Magma above the Earth’s surface . They include lava flow and volcanic ash. They are fine grained. Basalt , Gabbro and Obsidian.
Types:
Two types of extrusive igneous rocks are:
- Explosive are the results of volcanic materials in which dust and ash are deposited
- Quiet: Lava comes out quietly through minor cracks and fissures.
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