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Igneous Rock. (from fire). Extrusive: Volcanic glass (Obsidian). Extrusive: Basalt ( o cean floor; ridges). Extrusive: Pumice (volcanic explosions). Intrusive : Granite (course crystals). Intrusive: Dykes. Metamorphic. Changed Rock. Metamorphic : Gneiss (Compressed Granite).
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Igneous Rock (from fire)
Metamorphic Changed Rock
Sedimentary Deposit of eroded sediments