To the contrary, some of the erosion appears to be structurally controlled, perhaps by faults, layered rocks or even folded sediments.
(some of the erosion; appears; ) (some of the erosion; to be structurally controlled; perhaps by faults, layered rocks or even folded sediments)
some of the erosion some of the erosion
appears to be structurally controlled
perhaps by faults, layered rocks or even folded sediments