1 janv. 1960 - Harry H. Hess made the theory of sea floor spreading. When ocean plates separate it can cause fractures or cracks in the lithosphere and cools the seafloor. Seafloor spreading and the splitting of tectonic plates cause mantle convection.
Ajouté au bande de temps:
Date:
1 janv. 1960
Maintenaint
~ Il y a 65 ans