how do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading?\nthey show when earths…
how do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading?\nthey show when earths poles reversed.\nthey show how the density of the seafloor has changed.\nthey reveal a matching pattern on either side of the ridge.\nthey reveal differences in the mineral composition of newly created rock.
Answer
Brief Explanations:
Magnetic stripes in ocean - rock are formed as new rock is created at mid - ocean ridges. As the seafloor spreads, iron minerals in the magma align with Earth's magnetic field at the time of cooling. When Earth's magnetic poles reverse, the alignment of iron minerals in newly formed rock also changes, creating a pattern of alternating magnetic stripes. This pattern is symmetric on either side of the mid - ocean ridge, which is evidence of seafloor spreading.
Answer:
They show when Earth's poles reversed.