Then the river would change its course, creating a new delta, depositing silt in a new area.
(the river; would change; its course; creating a new delta, depositing silt in a new area; T:Then) Context(the river would change,List([5, 27))):(the river; would change its course depositing; silt; in a new area)
the river would change,List([5, 27))
the river the river
would change would change its course depositing
its course creating a new delta, depositing silt in a new area T:Then
silt in a new area