Complex sentence: The Weald Basin was a major topographic feature of southern England and northern France from the Triassic to the late Cretaceous, its uplift in the late Cretaceous marked the formation of the Wealden Anticline.
Split into simpler sentences: The Weald Basin was a major topographic feature of southern England and northern France from the Triassic to the late Cretaceous. Its uplift in the late Cretaceous marked the formation of the Wealden Anticline.