He used a navy ship to sound the sea floor. He found out magma was coming out of the mantle and into the sea floor.
sea floor spreading
Harry Hess
Henry H. hess
Harry Hess YAY;-)
Harry Hess =)
The Seafloor Spreading Theory was proposed by Harry Hess.
sea floor spreading
Harry Hess
Harry Hess
Harry Hess helped develop the idea of seafloor spreading.
1960 (although Hess' paper built upon Alfred Wegener's theory of continental drift , proposed in 1915).
Granitic strips in the ocean floor ... Novanet