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

LCC:

Where:

Date: Dec 27 2013 5:57 PM