The best way to determine the true shape of a continent is to trace the outer boundary of its continental shelf.
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Transform fault boundaries are located where plates grind past each other without either generating new lithosphere or consuming old lithosphere.
Along some divergent plate boundaries, oceanic crust is being consumed in subduction zones.
In the history of the Earth, there is only one Welson's cycle, describing the evolution of oceans.
Wilson's cycle indicates the evolution cycle of ocean development according to plate tectonics.