Plate tectonic theory began in 1915 when a German geologist named Alfred Wegener proposed his theory of continental drift.
(Plate tectonic theory; began; T:in 1915) (a German geologist; named; Alfred Wegener) (a German geologist named Alfred Wegener; proposed; his theory of continental drift; T:1915)
Plate tectonic theory a German geologist a German geologist named Alfred Wegener
began named proposed
T:in 1915
Alfred Wegener
his theory of continental drift T:1915