Magma Viscosity
Channel: Earth Rocks!
Date: 2019-01-24

For an introductory college-level earth sciences class: a review of the impacts of magma viscosity on how crystals form underground and how, above ground, lavas erupt, flow, and hold onto their gasses. Includes a discussion how obsidian forms above ground as well as pegmatites below ground.

**This video comes near the middle of the semester, so there may be terms with which the audience is unfamiliar. For a full playlist, refer to the Geology playlist on the Earth Rocks! YouTube Channel.

Content within this video is based on information available in any standard introductory college geology textbook, such as Essentials of Geology -- Tarbuck and Lutgens -- Pearson Publishing.

Part of a series of videos for Igneous Rocks:
1. Igneous Rocks 
2. Plutons
3. Magma Viscosity

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