Erosion of the mountains that rise to form the inland watershed boundary provides the material that forms the delta and sand and cobble bar, which extends across and closes the mouth of the Ventura River Estuary for most of each year.
(the mountains; rise; to form the inland watershed boundary) (cobble bar; closes; the mouth of the Ventura River Estuary; T:for most of each year) (Erosion of the mountains; provides; the material that forms the delta and sand and cobble bar,) (the material; forms; the delta and sand and cobble bar) (cobble bar; extends; across)
the mountains cobble bar Erosion of the mountains the material cobble bar
rise closes provides forms extends
to form the inland watershed boundary
the mouth of the Ventura River Estuary T:for most of each year
the material that forms the delta and sand and cobble bar,
the delta and sand and cobble bar
across