Assertion: ridge push | /r/HasProperty | active
Facets:
value: in lithosphere younger than 90 ma
type: TEMPORAL
value: mostly
type: DEGREE
Source sentences:
text: Ridge push is mostly active in lithosphere younger than 90 Ma, after which it has cooled enough to reach thermal equilibrium with older material and the slope of the Lithosphere-Asthenosphere boundary becomes effectively zero.