Extrusive Igneous: Forms from Cooling Lava, Forms Outside Earth´s Surface, Cools Quickly, Small or No Crystals, Smooth or Fine-Grained , Obsidian Glass, Intrusive Igneous: Forms from Cooling Magma, Forms Inside the Earth, Cools Slowly, Large Crystals, Rough or Coarse-Grained, Granite,

Igneous Rocks

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恢復自動保存: ?