Harry Hess Theory Of Sea Floor Spreading

The first comprehensive attempt at such an explanation was made by harry h.

Harry hess theory of sea floor spreading.

Harry hess published the history of ocean basins in 1962 outlining a theory of how tectonic plates can move which was later called sea floor spreading. After the war he remained active in the naval reserve reaching the rank of rear admiral. Plate tectonics plate tectonics hess s seafloor spreading model. The seafloor spreading hypothesis was proposed by the american geophysicist harry h.

This recycling process later named seafloor spreading carries off older sediment and fossils and moves the continents as new ocean crust spreads away from the ridges. This evidence was from the investigations of the molten material seafloor drilling radiometric age dating and fossil ages and the magnetic stripes. Hess of the united states in a widely circulated manuscript written in 1960 but not formally published for several years. On the basis of tharp s efforts and other new discoveries about the deep ocean floor hess postulated that molten material from earth s mantle continuously wells up along the crests of the mid ocean ridges that wind for nearly 80 000 km.

And alfred wegener was. Harry hess 1906 1969 in his navy uniform as captain of the assault transport cape johnson during world war ii. It was determined that the seafloor basalt is youngest at mid ocean ridges and oldest adjacent to continents. How does the density of earth s composition change as you get closer to the core.

Evidence of sea floor spreading. Hess proposes sea floor spreading 1960. Seafloor spreading had been proved. Harry hammond hess may 24 1906 august 25 1969 was an american geologist and a united states navy officer in world war ii who is considered one of the founding fathers of the unifying theory of plate tectonics he is best known for his theories on sea floor spreading specifically work on relationships between island arcs seafloor gravity anomalies and serpentinized peridotite.

He identified the presence of mid ocean ridges and that ocean trenches are where ocean floor is destroyed and recycled. Identify all of the different observations used to support harry hess theory of seafloor spreading. Young age of the seafloor fossils guoyots more dense oceanic crust. Harry hess argues that the continents had once been one and have drifted apart.

Supporting wegener s theory of continental drift hess explained how the once joined continents had separated into the seven that exist today. Harry hess s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory.