seafloor spreading by Harry Hess
The region where the seafloor is forced beneath the continental plate is called a subduction zone. When the seafloor descends down it produces a deep-ocean trench.
At divergent plate boundaries the spreading of the tectonic plates results in the reduced pressure of the underlying magma. As the spreading continues, lava fills in the area of spreading and cools, becoming the newest addition to the seafloor. This process occurs at a steady rate ranging from a few centimeters to several centimeters of new sea floor each year. However, at a different location opposite the newly formed seafloor are convergent plate boundaries where land and seafloor is destroyed to make room for new seafloor.
The Benthic Zone
500 to 1000 meters
Hess proposes seafloor spreading
Rocks in the seafloor are moving one place to another
large regions of the seafloor that appear flat but are not
Sonar is used to map the seafloor.
whatis the flat part of the seafloor called?
They proved that the seafloor was spreading.