Seafloor dating

The variation of the ages within each sample is mostly within the statistical error range.The relative order of the ages is consistent with the result of Pb method, but the determining absolute ages is still an issue.If you're seeing this message, it means we're having trouble loading external resources on our website.If you're behind a web filter, please make sure that the domains *.and *.are unblocked.Dating methods have been employed for hydrothermal sulfide deposits, such as the U-Th disequilibrium method (e.g.You and Bickle ) for the range less than 150 years.He believed that the high temperature was due to the magma that leaked out from the ridge.The Continental Drift Theory of Alfred Wegener in 1912 is supported by this hypothesis on the shift position of the earth’s surface.

When the molten magma reaches the oceanic crust, it cools and pushes away the existing rocks from the ridge equally in both directions.For example, the presence of recycled bricks at an archaeological site indicates the sequence in which the structures were built.Similarly, in geology, if distinctive granitic pebbles can be found in the sediment beside a similar granitic body, it can be inferred that the granite, after cooling, had been uplifted and eroded and therefore was not injected into the adjacent rock sequence.What is more, we can measure the rate of spreading directly by GPS, SLR, and VLBI.This means that if we didn't have any other way of doing absolute dating, we would as a first approximation take the age of basalt on a spreading sea floor to be the distance from the rift divided by the rate of spreading.

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