This confirmation of Alfred Wegener's theory of continental drift strengthened the proposal of a single, ancient land mass, which is called Pangaea.
(This confirmation of Alfred Wegener's theory of continental drift; strengthened; the proposal of a single, ancient land mass) (a single, ancient land mass; is called; Pangaea)
This confirmation of Alfred Wegener's theory of continental drift a single, ancient land mass
strengthened is called
the proposal of a single, ancient land mass
Pangaea