Evidence That The Ocean Floor Is Spreading

Due to this continuous seafloor spreading occurs and makes atlantic ocean floor to be connected to other continental crust making the ocean gets wider over the time.

Evidence that the ocean floor is spreading. Several types of evidence supported hess s theory of sea floor spreading. See also continental drift a veritable legion of evidence supports the seafloor spreading hypothesis. Variations in the intensity and polarity of earth s magnetic field are considered to be recorded in the remanent magnetism of the igneous rocks as they solidified and cooled through the curie temperature at the crest of an oceanic ridge and subsequently. It is suggested that the entire history of the ocean basins in terms of oceanfloor spreading is contained frozen in the oceanic crust.

Subduction and sea floor spreading are processes that could alter the size and form of the ocean. His theory of sea floor spreading maintained that new basaltic oceanic crust forms at a midoceanic ridge and is slowly pushed away on both sides toward the continents as more new crust is produced. This evidence led scientists to look again at wegener s hypothesis of continental drift. Evidence for sea floor spreading.

Measurements indicate that new crust moves away from a ridge at. Basalt the once molten rock that makes up most new oceanic crust is a fairly magnetic substance and scientists began using magnetometers to measure the magnetism of the ocean floor in the 1950s what they discovered was that the magnetism of the ocean floor around. Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves. In the 1960s geologist harry hess proposed that the sea floor was moving outward from the midoceanic ridges.