Magnetic Stripes On The Ocean Floor

Magnetic stripes on the ocean floor.

Magnetic stripes on the ocean floor. Select the two correct answers. When the earth s magnetic field reverses a new stripe with the new polarity begins. Evidence for sea floor spreading. Several types of evidence supported hess s theory of sea floor spreading.

Magma acquires the magnetic direction present on earth when it hardens into rock 3. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor. New oceanic lithosphere is generated at mid ocean ridges. Among the new findings was the discovery of zebra stripe like magnetic patterns for the rocks of the ocean floor.

The earth s magnetic field has flipped the n pole becoming the s pole and vice versa many times over geological time. The figure below includes two images of the ocean floor. Plates move as new rock forms which causes magnetic direction to skew away. These patterns were unlike any seen for continental rocks.

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. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks. Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves. A lab simulation learning objectives.

Chapter 1 section 4. Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor. Plate tectonic processes can affect climate. 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.

As the african crust stretched thin streams of magma intruded the continental crust and hardened. The concept of seafloor spreading was supported by magnetic polarity stripes on the ocean floor. As tectonic plates move apart new rock is formed and locks in the direction of the magnetic field at the time. And unlike magnetic stripes on the ocean floor tendaho s formed through diking.

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. Identify the factors that cause magnetic stripes to form along the ocean floor. Magnetic striping magnetic minerals are found in rocks. Magnetic direction of rock changes as earth s magnetic poles drift.