The existence of these three types of large striking seafloor features demanded a global rather than local tectonic explanation.
Harry hess s theory of seafloor spreading.
Harry hess s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory.
Harry hess argues that the continents had once been one and have drifted apart.
Hess of the united states in a widely circulated manuscript written in 1960 but not formally published for several years.
This evidence was from the investigations of the molten material seafloor drilling radiometric age dating and fossil ages and the magnetic stripes.
The first comprehensive attempt at such an explanation was made by harry h.
Evidence of sea floor spreading.
Harry hess was a profecer of geology at princeton university in the 1960 s and he played a key role in the development of the theory of plate tectonics.
After the war he remained active in the naval reserve reaching the rank of rear admiral.
Harry hess 1906 1969 in his navy uniform as captain of the assault transport cape johnson during world war ii.
He identified the presence of mid ocean ridges and that ocean trenches are where ocean floor is destroyed and recycled.
With the discovery of plate tectonics and the mapping of the earth.