Magnetic Stripes On The Ocean Floor

Plates move as new rock forms which causes magnetic direction to skew away.

Magnetic stripes on the ocean floor.

Evidence for sea floor spreading. Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor. When the earth s magnetic field reverses a new stripe with the new polarity begins.

As the african crust stretched thin streams of magma intruded the continental crust and hardened. These patterns were unlike any seen for continental rocks. 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.

Chapter 1 section 4. Identify the factors that cause magnetic stripes to form along the ocean floor. Magnetic striping magnetic minerals are found in rocks. Plate tectonic processes can affect climate.

The figure below includes two images of the ocean floor. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks. As tectonic plates move apart new rock is formed and locks in the direction of the magnetic field at the time. By using the magnetometer the magnetic polarity will be shown through a timescale that contains the normal and a reverse polarity.

In the 20th century the magnetic survey was conducted in the mid ocean ridge in order to investigate evidence of sea floor spreading. Select the two correct answers. And unlike magnetic stripes on the ocean floor tendaho s formed through diking. Several types of evidence supported hess s theory of sea floor spreading.

The earth s magnetic field has flipped the n pole becoming the s pole and vice versa many times over geological time. Among the new findings was the discovery of zebra stripe like magnetic patterns for the rocks of the ocean floor. New oceanic lithosphere is generated at mid ocean ridges. 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.

Magma acquires the magnetic direction present on earth when it hardens into rock 3. The hawaiian islands are a volcanic arc atop an oceanic subduction zone. 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. The concept of seafloor spreading was supported by magnetic polarity stripes on the ocean floor.