Radioisotope dating has helped geologists to prove that as a new crust is formed at an oceanic ridge and pulled apart sideways, rocks get progressively older the further they are from the ridge. When ages of sea floor rocks are mapped out we see the oceanic crust is that is the newest at the ridges and the oldest furthest from the ridges. This was propsed by Harry Hess in the 1960's, when he proposed tha ridges are located above zones of pressure in the mantle, resulting in the creation of new seafloor.
Sediments in the seafloor such as organic debris helps to prove this as well as there are no sediments located at the ridge and the sediment layers get thicker as you move away from the ridges and radioisotope dating helps to prove this.
This piece of evidence provides substantial proof for the continental drift theory, as it shows that new rocks are being formed continuously at the oceanic ridges, proving that the ridges were once joined and are still moving and separating today.
Sediments in the seafloor such as organic debris helps to prove this as well as there are no sediments located at the ridge and the sediment layers get thicker as you move away from the ridges and radioisotope dating helps to prove this.
This piece of evidence provides substantial proof for the continental drift theory, as it shows that new rocks are being formed continuously at the oceanic ridges, proving that the ridges were once joined and are still moving and separating today.
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