Define Sea Floor Spreading. Seabed The Earths crust in this view is divided into several immense plates that make up the continents and seafloors and that all float on a hot plastic. Seafloor spreading helps explain continental drift in the theory of plate tectonics.
This theory introduced by harry hess was proven as patterns of magnetic field polarity preserved in seafloor basalt and by age dating of the rocks. Seafloor spreading helps explain continental drift in the theory of plate tectonics. Seafloor spreading is a process that occurs at mid-ocean ridges where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century.
Seafloor spreading theory of lithospheric evolution that holds that the ocean floors are spreading outward from vast underwater ridges. Definition Seafloor spreading occurs at divergent plate boundaries. When oceanic plates diverge tensional stress causes fractures to occur in the lithosphere. Seabed The Earths crust in this view is divided into several immense plates that make up the continents and seafloors and that all float on a hot plastic.
