Which data supports the seafloor spreading hypothesis
1. Magnetic striping: Scientists have observed parallel patterns of magnetic stripes on either side of mid-ocean ridges. These stripes represent periods of normal and reversed magnetic polarity in the Earth's history, providing evidence for seafloor spreading.
2. Age of oceanic crust: Oceanic crust near mid-ocean ridges is younger than crust further away. This supports the idea that new crust is constantly being formed at the ridges and spreading outward.
3. Rift valleys: Rift valleys are often found at mid-ocean ridges, created as the oceanic plates move apart and new crust is formed. This supports the idea that seafloor spreading is actively occurring.
4. Evidence of magma: Scientists have observed evidence of magma rising to the surface at mid-ocean ridges, providing further support for the idea of crustal spreading and formation.
5. Fossil evidence: Fossils of similar species have been found on either side of mid-ocean ridges, suggesting that the continents were once connected and have since moved apart due to seafloor spreading.