Assertion: drainage basin's part | /r/HasProperty | smooth
Facets:
value: extremely
type: DEGREE
Source sentences:
text: East and west of the ridge, about 12,000 to 18,000 feet (3,700 to 5,500 metres) below sea level, lie basins that seem to present a relatively even profile, but parts of the basin floor are as mountainous as the Mid-Atlantic Ridge, while other parts are extremely smooth.