Cosmogenic burial dating

22-Jun-2017 21:55

The hypotheses of large-scale continental movements, seafloor spreading and subduction, and the relative youth of the oceanic crust are contradicted by a substantial volume of data.Evidence for significant amounts of submerged continental crust in the present-day oceans provides another major challenge to plate tectonics.The fundamental principles of plate tectonics therefore require critical reexamination, revision, or rejection.Pratt goes on to challenge many of the basic tenets of the plate tectonic theory to include the most fundamental concept of plates sliding over the lubricating asthenosphere.Such convection currents do not seem to be consistent with such layering.It was hoped that seismic tomography would give clear evidence of such convection-cell patterns.

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This is a problem because subduction cannot be used to explain the movement of certain massive continental plates such as the Eurasian plate.It has long been theorized that the driving forces of plate movements are deep convection currents that well up beneath the mid-ocean ridges and then circle back down beneath the ocean trenches.

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