You may have noticed that there are many kinds of rocks, from the soft sandy rocks that form the cliffs at Scripps beach to the hard rocks that form the mountains to the East of San Diego.
(the soft sandy rocks; form; the cliffs at Scripps beach to the hard rocks) (the hard rocks; form; the mountains)
the soft sandy rocks the hard rocks
form form
the cliffs at Scripps beach to the hard rocks
the mountains