The Bedford Canyon Formation was subjected to long periods of erosion, then it was submerged and younger sediments were deposited upon it.
(younger sediments; were deposited; upon it) (it; was submerged; T:then) Context(it was submerged,List([76, 92))):(The Bedford Canyon Formation; was subjected; to long periods of erosion)
it was submerged,List([76, 92))
younger sediments it The Bedford Canyon Formation
were deposited was submerged was subjected
upon it
T:then
to long periods of erosion