Confirmation of seafloor spreading was supported by the: (Which One)age of seafloor.apparent polar wandering.magnetic reversals found in continental rocks.match of rocks from distant continents.sediment analysis from different areas of the seafloor.
It seems that all support it except for, perhaps magnetic reversals found in continental rocks. The sea floor closer to the mid-atlantic ridge is younger than regions further away, thus there would be different amounts and ages of sediment. Polar wandering and magnetic reversals refer to polarity direction differences. These occur because, when magma cools and solidifies, magnetic material line up according to the direction to the Earth's poles at the time of cooling. Several times in the Earth's history its magnetic poles have moved or flipped. Plus, tectonic plate movement could also change the angles recorded in rocks of different ages. It seems to me that magnetic reversals found in continental rocks would only help substantiate age estimates of magnetic reversals seen in sea floor rocks. If rocks from different continents match, this would be easier to explain as an ocean growing between them rather than as a global landscaping project.
