Used As Evidence For Sea Floor Spreading. Lima explains the different kinds of evidence available to support sea floor spreading including differences in age structure and composition between c. Magnetic reversal proves seafloor spreading because we can see the polarity of the Earths magnetic field in rocks.
Their crystals are pulled into alignment the Earths magnetic field. Younger rocks are found near the ridges and older rocks are found near continents. A veritable legion of evidence supports the seafloor spreading hypothesis.
Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves.
Measurements indicate that new crust moves away from a. Studies conducted with thermal probes for example indicate that the heat flow through bottom sediments is generally comparable to that through the continents except over the mid-ocean ridges where at some sites the heat flow measures three to four times the normal value. Magnetic strips on rocks and pole reversal. The less-dense material rises often forming a mountain or elevated area of the seafloor.
