The heavy rain and wind of the Pacific Northwest eroded the sandstone, then rivers carried it to the ocean.
(rivers; carried; it; to the ocean; T:then) Context(rivers carried,List([76, 90))):(The heavy rain and wind of the Pacific Northwest; eroded; the sandstone)
rivers carried,List([76, 90))
rivers The heavy rain and wind of the Pacific Northwest
carried eroded
it to the ocean T:then
the sandstone