Assertion: ridge | /r/HasProperty | ocean island tholeiites
Facets:
value: primarily
type: DEGREE
Source sentences:
text: The ridge is primarily composed of Ocean Island Tholeiites (OIT), a subset of basalt which increase in age from approximately 43.2 ± 0.5 Ma in the south to 81.8 ± 2.6 Ma in the north though a more recent analysis using modern