It is presumed that Catoctin Mountain was once a terrane that got accreted to Proto North America as the plate was being moved around by tectonic processes.
(a terrane; got; accreted to Proto North America) (a terrane; got accreted; T:as the plate was being moved around by tectonic processes) (the plate; was being moved; around; by tectonic processes)
a terrane a terrane the plate
got got accreted was being moved
accreted to Proto North America
T:as the plate was being moved around by tectonic processes
around by tectonic processes