Complex sentence: This sequence is divided into several sub-units and the change in lithofacies is a result of the Carboniferous to Jurassic rifting event that induced a change in the depositional environment.
Split into simpler sentences: This sequence is divided into several sub-units due to the different lithofacies present in the sequence. Specific to this sequence, the Carboniferous to Jurassic rifting event was the cause of the changing depositional environment.