Through seafloor-spreading as iron rich minerals cool they become magnetized in the direction parallel to the existing magnetic field. As the magnetic fields change direction so will the magnetized minerals, allowing scientists to record each change in the seafloor as it spreads.
Magnetic reversals and sea floor spreading.
rocks get older as you move away from ocean ridges
Magnetic stripes can be seen as you move away from ocean ridges.
The best evidence of crustal movement is seismic activity, where earthquakes occur due to the shifting of tectonic plates underneath the Earth's surface. Geological features like mountains, rift valleys, and ocean trenches also provide evidence of crustal movement over long periods of time. Additionally, the alignment of magnetic minerals in rocks recording the past movements of the Earth's magnetic poles is another indicator of crustal movement.
True. Bands of magnetic material in the sea floor that have opposite poles or exhibit magnetic reversal provide evidence for sea floor spreading. This is because as new oceanic crust forms at mid-ocean ridges, Earth's magnetic field periodically reverses, creating magnetic stripes on the ocean floor that align with the direction of the magnetic field at that time.
Earth's magnetic field reverses over time; the changes show that seafloor has taken place over time.
by the plate tectonic and the ocean bridges
seafloor spreading
Magnetic reversals and sea floor spreading.
Because of the stripes at the sea floor which are magnetic minerals
One piece of evidence is the study of ancient rocks that show reversals in magnetic orientation. Another evidence comes from observations of the movement of the magnetic poles over time. Additionally, observations of magnetic anomalies in the Earth's crust provide further evidence of changes in the magnetic field.
Because of the stripes at the sea floor which are magnetic minerals
rocks get older as you move away from ocean ridges
type your anwser here
Magnetic stripes can be seen as you move away from ocean ridges.
They tend to align along the magnetic field lines.
The presence of magnetic domains of alternating orientation parallel to the plate boundaries.