Assertion: estuary | /r/CapableOf | owe its origins
Facets:
value: to carboniferous
type: TEMPORAL
value: to form an iceway
type: PURPOSE
Source sentences:
text: The estuary owes its origins to the scouring of a broad channel through the Triassic sandstones and Carboniferous mudstones by glacial ice during successive ice ages to form an iceway.