PROGRESS IN GEOLOGY IN 20TH CENTURY

Alfred Wegener- theory of continental drift
Roert S. Dietz and Harry S. Hess- proposed the hypothesis of seafloor spreading
S.K. Runcorn- suggested the concept of paleomagnet
Gene Shoemaker- took the study of the moon awy from lunar

EARTH COMPOSED OF:

• Crust
• Mantle
• Core