Earthy Burpings

a: Volcano ~
b: huge volcanic burp

What: "A maar volcano is like a huge volcanic burp. With a maar volcano, magma flowing to the surface did not reach the top to create a cinder cone or lava flow. Instead the magma flow became blocked and the available ground water then became super-heated. The resulting steam pressure eventually became so great that it blew off the covering mantle and left a huge flat-floor crater."

Writer: David Ryan
Date: Dec 27 2013 5:57 PM

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