The Appalachian Mountains were formed during earlier geologic ages when the east coast of North America was at the edge of a tectonic plate.
(The Appalachian Mountains; were formed; T:during earlier geologic ages) (the east coast of North America; was; at the edge of a tectonic plate; T:earlier geologic ages)
The Appalachian Mountains the east coast of North America
were formed was
T:during earlier geologic ages
at the edge of a tectonic plate T:earlier geologic ages