Magnetic Stripes On The Ocean Floor

Such magnetic patterns led to recognition of the occurrence of sea floor spreading and they remain some of the strongest evidence for the theory of plate tectonics.

Magnetic stripes on the ocean floor.

When magma flows out of a mid ocean ridge small magnetic minerals in the magma align themselves to point in the direction of the earth s current magnetic north. Evidence for sea floor spreading. And unlike magnetic stripes on the ocean floor tendaho s formed through diking. As the african crust stretched thin streams of magma intruded the continental crust and hardened.

Plates move as new rock forms which causes magnetic direction to skew away. Magnetic stripes on the ocean floor. Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks.

The concept of seafloor spreading was supported by magnetic polarity stripes on the ocean floor. Select the two correct answers. Several types of evidence supported hess s theory of sea floor spreading. Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor.

By using the magnetometer the magnetic polarity will be shown through a timescale that contains the normal and a reverse polarity. When the earth s magnetic field reverses a new stripe with the new polarity begins. Magnetic direction of rock changes as earth s magnetic poles drift. A lab simulation learning objectives.

Chapter 1 section 4. Plate tectonic processes can affect climate. Magnetic striping of the sea floor after mid ocean ridges and trenches were discovered more evidence was discovered that helped to support the theory that the continents had moved around. Among the new findings was the discovery of zebra stripe like magnetic patterns for the rocks of the ocean floor.

In the 20th century the magnetic survey was conducted in the mid ocean ridge in order to investigate evidence of sea floor spreading. New oceanic lithosphere is generated at mid ocean ridges. The earth s magnetic field has flipped the n pole becoming the s pole and vice versa many times over geological time. Magnetic striping magnetic minerals are found in rocks.

Magma acquires the magnetic direction present on earth when it hardens into rock 3. The figure below includes two images of the ocean floor. These patterns were unlike any seen for continental rocks. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor.