Magnetic Reversals On The Ocean Floor

Most dry land has a modest elevation above sea level while most of the ocean floor is about 3 kilometers or 2 miles lower down.

Magnetic reversals on the ocean floor.

The area of in between depths e g. Explains how magnetic polarity frozen into seafloor basalts reveals evidence for the creation of new seafloor at mid ocean ridges. It is known that leading up to a magnetic reversal the strength of the field. How magnetic reversals on the seafloor provide evidence for seafloor spreading.

Where the ocean is about 1 kilometer deep is much less. The past record of geomagnetic reversals was first noticed by observing the magnetic stripe anomalies on the ocean floor. Magnetic reversals moving continents 16. Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor.

It was determined that the rock of the ocean floor had bands of embedded iron oxides that alternately pointed toward geographic north and geographic south. Past field reversals can be and have been recorded in the frozen ferromagnetic or more accurately ferrimagnetic minerals of consolidated sedimentary deposits or cooled volcanic flows on land. In the 1950s ocean going research vessels recorded puzzling data based on the magnetism of the ocean floor.