Types of Lava - Pahoehoe and A'a
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Descrição
Learn about the types of lava including the forms of lava flow (pahoehoe and a'a) and the chemical composition based on silica content.

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Notice the difference between the Aa and Pahoehoe lava. Aa lava is viscous, jagged and chunky and moves very sloooowly.

Global Volcanism Program

Dynamics and viscosity of 'a'a and pahoehoe lava flows of the 2012–2013 eruption of Tolbachik volcano, Kamchatka (Russia)
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