Over a long period of time things can move suck as ROCK can move in the ocean from high and low tides, pressure, and waves only up to 3 ft....
because
seafloor spreading
type your anwser here
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
by the plate tectonic and the ocean bridges
Because of the stripes at the sea floor which are magnetic minerals
Because of the stripes at the sea floor which are magnetic minerals
provide evidence for sea-floor spreading
The presence of magnetic domains of alternating orientation parallel to the plate boundaries.
Rocks along the central valley of the mid-ocean ridge display symmetrical patterns of magnetic striping where new oceanic crust is formed. This occurs as magma is extruded along the ridge, creating a record of Earth's changing magnetic field over time. The alternating magnetic polarity of these rocks provides concrete evidence for sea-floor spreading and the movement of tectonic plates.
Seismic Waves, Rock formations, and the shapes of the continents over time
Earthquake patterns were used to provide evidence of seafloor spreading through the discovery of mid-ocean ridges. Scientists observed that earthquakes were concentrated along these ridges, indicating the presence of tectonic activity associated with the movement of tectonic plates. This supported the theory of seafloor spreading, where new oceanic crust is formed at mid-ocean ridges and pushes older crust away from the ridge.