As the glaciers melted, the valleys that had been carved out by the glaciers as they moved south began to fill with water, creating the various lakes now known collectively as the Finger Lakes.
(the glaciers; melted; ) (the valleys that had been carved out by the glaciers; creating; the various lakes now known collectively as the Finger Lakes) (the valleys; had been carved out; by the glaciers; T:as they moved south) (the various lakes; known collectively; as the Finger Lakes; T:now) (they; moved; south) (the valleys that had been carved out by the glaciers; began; T:As the glaciers melted) (the valleys that had been carved out by the glaciers; to fill; with water)
the glaciers the valleys that had been carved out by the glaciers the valleys the various lakes they the valleys that had been carved out by the glaciers the valleys that had been carved out by the glaciers
melted creating had been carved out known collectively moved began to fill
the various lakes now known collectively as the Finger Lakes
by the glaciers T:as they moved south
as the Finger Lakes T:now
south
T:As the glaciers melted
with water