Lines Of Evidence That Confirms Sea Floor Spreading

Evidence of sea floor spreading harry hess s hypothesis about seafloor spreading had collected several pieces of evidence to support the theory.

Lines of evidence that confirms sea floor spreading.

The deep sea drilling project extracted samples of the ocean floor that provided evidence to support the hypothesis of seafloor spreading and the theory of plate tectonics. Seafloor spreading theory that oceanic crust forms along submarine mountain zones and spreads out laterally away from them. This evidence was from the investigations of the molten material seafloor drilling radiometric age dating and fossil ages and the magnetic stripes. Abundant evidence supports the major contentions of the seafloor spreading theory.

Seafloor spreading brings them together. The validity of seafloor spreading was confirmed most notably by two lines of evidence. What lines of evidence confirm that seafloor spreading has been taking place and that the positions and configuration of continents and ocean basins changes over geologic time. What lines of evidence confirm that seafloor spreading has been taking place and that the positions and configuration of continents and ocean basins changes over geologic time.

What is the general relationship between global earthquake activity and plate boundaries. You should be able to describe and explain at least one line of evidence found on the ocean floors that verifies seafloor spreading. Ocean floor is created by the process of subduction. Subduction causes continents to move apart.

This idea played a pivotal role in the development of the theory of plate tectonics which revolutionized geologic thought during the last quarter of the 20th century. Learn how these samples. Seafloor spreading pushes up new land mass. Ocean basins get narrower as a result of seafloor spreading.

3 add picture from page 406 seafloor spreading is a theory that states that midocean ridges are formed by currents of magma rising up from the mantle. When any rock containing iron is formed such as iron rich ocean floor basalt it is magnetized so that the magnetic field within its iron rich grains become aligned with earth s magnetic field. Paleomagnetism and ocean floor core sampling. You should be able to explain both paleomagnetic evidence and that of ocean floor core samples.

You should be able to explain evidence from both paleomagnetism and ocean floor cores. To keep the earth s surface area constant the amount of seafloor spreading must equal the amount of subduction.