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Geochemistry

Periodic Graphics: Lava and volcanic gases

Chemical educator and Compound Interest blogger Andy Brunning probes the molecular makeup of the molten rock and gases spewed by volcanoes

by Andy Brunning
July 8, 2018 | APPEARED IN VOLUME 96, ISSUE 28

 

 
 

To download a pdf of this article, visit http://cenm.ag/volcanochem.

References used to create this graphic:

Chemical composition of volcanic gases

Pyroclastic flows

Volcanoes, magma, and volcanic eruptions

What’s the difference between magma and lava?

Emissions from volcanoes

A collaboration between C&EN and Andy Brunning, author of the popular graphics blog Compound Interest

To see more of Brunning’s work, go to compoundchem.com. To see all of C&EN’s Periodic Graphics, visit cenm.ag/periodicgraphics.

 

CORRECTION: This infographic was updated on July 27, 2018, to correct the relative viscosities of pahoehoe and aa lava flows. Pahoehoe lava flows do not have higher viscosity than aa lava flows. They have lower viscosity.

This article has been translated into Spanish by Divulgame.org and can be found here.

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Comments
Munyr (Wed Aug 01 10:54:40 EDT 2018)
The Pahoehoe mafic lava has lower viscosity, so it flows quickly and the AA mafic lava has higher viscosity, so it flows slower, is it right? I think it's mistaken on the graphic.
I love these articles, they teach a lot about daily chemistry...
Regards.

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