Answer: moltenlava

AnswerCrossword Clue
MOLTENLAVAYou might have heard about how it gets expelled in geology class
MOLTENLAVAIt's hot stuff
MOLTENLAVAIgneous rock, once
MOLTENLAVAVolcanic output
MOLTENLAVAHot flower
MOLTENLAVAEruption output
MOLTENLAVAHot stuff
MOLTENLAVARolling rock
MOLTENLAVAEtna output
MOLTENLAVAKilauea flow
MOLTENLAVAIt once settled near Pompeii
MOLTENLAVAHot roll?
MOLTENLAVAFuji flow
MOLTENLAVASoft rock?
MOLTENLAVAStream on the side of a mountain, perhaps