• Igneous Rocks

    1. Intrusive--Magma

      1. Granite

        1. Topic

    2. Extrusive--Lava

      1. Obsidian

        1. Topic

          1. Topic

      2. Pumice

        1. Topic

          1. Topic

      3. Basalt

        1. Topic

          1. Topic

            1. Topic

      4. Porphyritic

        1. Topic

          1. Topic

    3. Topic

    4. cools slowly-forms crystals

    5. Cools quickly-fewer crystals

    6. coarse grained

    7. Glassy

    8. Fine grained

    9. Fine and coarse grained

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    Igneous Rocks

    Added: 2010-02-15 05:12:59

    From: twillsheep (Joined 2010-02-14 00:15:11)

    127 views |0 downloads

    Igneous Rocks

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