Science Friday Edit this Published in Science Friday SciFri: Beneath a Sleeping Volcano, Magma Mush Lies in Wait Listen Queue Download this audio Want to embed this player? Use the code below. More info. <iframe width="600" height="130" frameborder="0" scrolling="no" src="//www.wnyc.org/widgets/ondemand_player/wnyc/#file=json/355867"></iframe> Share on Facebook Share on Twitter Email a Friend Despite what Hollywood might show you, there’s no big tank of liquid rock under a volcano. Stored magma spends most of its time as a crystalline mush.