The following information is about Porphyritic.

Porphyritic Defined

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Off-site Porphyritic Links, User Submitted

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Mon Oct 20

• Igneous Rocks - Formation with Animation

Mon Jun 2

• Fine-Grained Porphyritic Textures: Many rocks with an overall fine-grained texture display scattered minerals that are more than 1 mm across. This porphyritic texture indicates that the magma sat and cooled a bit below the Earth's surface, thus giving time for the large crystals to grow, b

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Off-site Porphyritic Research Links

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