1. How does the pattern of the ages of rocks of the seafloor support the theory of plate tectonics?

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Answer 1

The pattern of the ages of rocks on the seafloor supports the theory of plate tectonics by demonstrating the process of seafloor spreading. As new oceanic crust is formed at mid-ocean ridges, magma rises to the surface and solidifies, creating new rocks. Over time, more and more rocks are added to the seafloor.

By analyzing the ages of these rocks, scientists have observed a symmetrical pattern. They have found that rocks closest to the mid-ocean ridges are the youngest, while rocks farther away are progressively older. This pattern is consistent with the theory of plate tectonics, which suggests that new seafloor is continuously being formed at the mid-ocean ridges and then moving away from them.

Furthermore, the ages of the rocks also support the concept of subduction zones, where older rocks are usually found. In these zones, one tectonic plate is forced beneath another and sinks into the mantle. As a result, older rocks get pushed down and recycled into the Earth's interior.

Overall, the pattern of the ages of rocks on the seafloor provides strong evidence for the theory of plate tectonics by illustrating the continuous creation and movement of oceanic crust.