Assertion: seamount's summit | /r/HasProperty | covered by features
Facets:
value: at ridges
type: LOCATION
value: at the margin of the summit
type: LOCATION
Source sentences:
text: This flat summit is covered by 10–20 metres (33–66 ft) high volcanic cones and features terraces at the margin of the summit as well as ridges that point due north, east, south and west.