Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
Sea floor spreading evidence.
The oldest sediments so far recovered by a variety of methods including coring dredging and deep sea drilling date only to the jurassic period not exceeding about 200 million years in age.
Measurements of the thickness of marine sediments and absolute age determinations of such bottom material have provided additional evidence for seafloor spreading.
Evidence for sea floor spreading.
Measurements indicate that new crust moves away from a ridge at.
Seafloor spreading occurs along mid ocean ridges large mountain ranges rising from the ocean floor.
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.
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Several types of evidence supported hess s theory of sea floor spreading.
This evidence was from the investigations of the molten material seafloor drilling radiometric age dating and fossil ages and the magnetic stripes.
This evidence led scientists to look again at wegener s hypothesis of continental drift.