Magnetic reversals
Not really but sea floor sediments thickness increase with increased distance from spreading centers which is good evidence. Other evidence such as magnetic reversals, temperature, dating methods provide the best evidence of seafloor spreading
Magnetic minerals on the ocean floor.
Because of the stripes at the sea floor which are magnetic minerals
Magnetic reversals and sea floor spreading.
Magnetic reversals and sea floor spreading.
Magnetic reversals and sea floor spreading.
The spreading of the sea floor.
seafloor spreading, age of the sea floor and ocean trenches.
As the sea floor spreads the magnetic orientation in the rocks as they cooled is preserved. As the earth's magnetic field changes then a distinct pattern is imprinted in the rocks. If sea floor spreading is true then this unique pattern should be the same on both sides from the spreading point. Measurements of sea bottom rocks verify this symmetry is true. :)
Because people love cats
It just did, you could see it
by the plate tectonic and the ocean bridges