Magma Viscosity, Gas Content & Milkshakes

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Lava flowing into the ocean, Hawaii

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GeoScience Videos


This video describes the principle control on the violence of volcanic eruptions. We define the term viscosity and show examples of everyday materials with different viscosity. Next we are splattered with soda and milkshake to illustrate how gases can drive volcanic eruptions (the sacrifices we make for science). Finally, we explain how viscosity and gas content influence the style of eruptions from shield and composite volcanoes.

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