Assertion: volcano's magma | /r/CapableOf | rise to the earth's surface
Facets:
value: directly
type: MANNER
Source sentences:
text: Volcanism is caused by magma, which either rises directly to the earth's surface from the upper regions of the earth's mantle or, in the majority of cases, gathers in a magma chamber, several tens of kilometres deep, at the base of the earth's crust, from which magma rises at irregular intervals and causes volcanic eruptions.