10 nov 1965 anni - Harry Hess proposed the theory of seafloor spreading. The Mid-Atlantic Ridge was found in the 1960's. It is 40,000 miles long. Some evidence that supports Hess's theory is that rock closer to the ridge is younger, and as you get further away from the ridge is older. Another piece of evidence is that the seafloor is younger than the continents, that means older crust gets reabsorbed into the mantle. I used article 5.
Aggiunto al nastro di tempo:
Data:
10 nov 1965 anni
Adesso
~ 59 years ago