Science Friday Published by 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 frameborder="0" scrolling="no" height="130" width="100%" src="https://www.wnyc.org/widgets/ondemand_player/wnyc/#file=/audio/json/355867/&share=1"></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.