Assertion: lava | /r/Causes | sub-glacial melting
Facets:
Source sentences:
text: A series of crescent-shaped fractures in the ice field, which extended 500 m from the S end of the lava field, suggested that lava had reached the caldera floor and caused sub-glacial melting, local ice cap uplift, and subsequent collapse similar to the 1983-84 eruption.