SOLAR SYSTEM

Detailed explanation-1: -The fact that the youngest rocks are located at the mid-ocean ridges is evidence for seafloor spreading. The Theory of Seafloor Spreading is also supported by magnetic evidence in rocks and by the ages of rocks on the ocean floor.

Detailed explanation-2: -Comparing the ages of the oceanic crust near a mid-ocean ridge shows that the crust is youngest right at the spreading center, and gets progressively older as you move away from the divergent boundary in either direction, aging approximately 1 million years for every 20-40 km from the ridge.

Detailed explanation-3: -Seafloor rocks are oldest near the edges of continents or deep-sea trenches.

Detailed explanation-4: -At the mid-ocean ridge, molten materials rise from the mantle and erupts. The molten material spreads out, pushing older rock to both sides of the ridge. Hess called this process Sea-Floor Spreading.