Question

Evidence for sea floor spreading

Answer 1

The rocks near the mid-ocean ridge were younger then rock near trenches. Matching bands of magnetic rocks were found on either side of the mid-ocean ridge; bands like tree ring - record changes in earths magnetic field over time. Earthquake data showed oceanic crust is sinking on to the mantle at trenches.

Answer 2

Answer: The evidences of seas floor spreading are as follows-

1. The sea floor spreading is taking place because of the constant plate tectonic movement.
2. The plates moves in opposite direction along the mid oceanic ridge, where new materials are added forming a new young crust.
3. The rocks that are found near the mid oceanic ridge are younger than the rocks that are found away from the mid oceanic ridge.
4. The alternating magnetic strips studied on the particles, observed on both the sides of the mid oceanic ridge are identical.