Magnetic Stripes On The Ocean Floor

Evidence for sea floor spreading.

Magnetic stripes on 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. 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. In the 20th century the magnetic survey was conducted in the mid ocean ridge in order to investigate evidence of sea floor spreading. The hawaiian islands are a volcanic arc atop an oceanic subduction zone.

Chapter 1 section 4. Magnetic striping magnetic minerals are found in rocks. The concept of seafloor spreading was supported by magnetic polarity stripes on the ocean floor. Magma acquires the magnetic direction present on earth when it hardens into rock 3.

The figure below includes two images of the ocean floor. As the african crust stretched thin streams of magma intruded the continental crust and hardened. And unlike magnetic stripes on the ocean floor tendaho s formed through diking. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks.

Plate tectonic processes can affect climate. Magnetic stripes on the ocean floor. Plates move as new rock forms which causes magnetic direction to skew away. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor.

These patterns were unlike any seen for continental rocks. New oceanic lithosphere is generated at mid ocean ridges. 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. A lab simulation learning objectives.

Among the new findings was the discovery of zebra stripe like magnetic patterns for the rocks of the ocean floor. Select the two correct answers. Eruptions of molten material magnetic stripes in the rock of the ocean floor and the ages of the rocks themselves. Magnetic direction of rock changes as earth s magnetic poles drift.

Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor. Identify the factors that cause magnetic stripes to form along the ocean floor. By using the magnetometer the magnetic polarity will be shown through a timescale that contains the normal and a reverse polarity. As tectonic plates move apart new rock is formed and locks in the direction of the magnetic field at the time.