Complex sentence: The peninsula has experienced continuous subduction for over 200 million years, but changes in continental configurations during the amalgamation and breakup of continents have changed the orientation of the peninsula itself, as well as the underlying volcanic rocks associated with the subduction zone.
Split into simpler sentences: The peninsula has experienced continuous subduction for over 200 million years. These shifts changed the orientation of the peninsula itself, as well as the underlying volcanics associated with the subduction zone.