Assertion: range's history | /r/HasAspect | three separate stages
Facets:
Source sentences:
text: The history of movement along the rift has been divided into three separate stages: an initial stage during the late Eocene to early Oligocene, a second stage during the late Oligocene to late Miocene, and a third stage beginning in the late Miocene or early Pliocene and continuing to the recent past.