alternating
The Earth's magnetic field. This is proven by measuring the magnetic orientation of the rocks as you move away from the Mid ocean Ridge.
Strips of oceanic crust on either side of the mid-oceanic ridge mirror the magnetic alignment of their mirror image on the other side of the ridge. Their specific magnetic alignment was formed at the time of solidification from magma. This stripe pattern in the mirror images of crust on either side of the mid-oceanic ridge indicates that new crust is being formed at the same time on both sides of the ridge simultaneously. This is the mechanism of plate movement.
As you move away from an ocean ridge, the rocks get older.
as you move away from an ocean ridge the rocks get older
magnetic field.
They are arranged in a pattern with magnetic strips having reversed polarities.
its the same on either side of the mid-ocean ridge
magnetic field..
because the scientists found that the farther the rocks the older the rocks were. so the youngest rocks were found near the mid-ocean ridge. this showed that sea-floor spreading took place. +++ The primary evidence is "magnetic striping": remnant magnetising by the Earth's magnetic field of the iron compounds in the basalt forming the ocean floor. The magnetic traces are parallel to the spreading-ridges, and their polarity reflect the field's periodic reversal. The further from the ridge, the older the stripes. The rock is imprinted with the magnetism as it cools below a certain point in being eruped along the ridge.
Magnetic field direction.
magnetic field .
Magnetic alignment of rocks, in alternating strips that run parallel to ridges, indicates reversals in Earth's magnetic field and provides further evidence of seafloor spreading.