Magnetic Anomaly Stripes On Ocean Floors

Mapping of variation over an area is valuable in detecting structures obscured by overlying material. In geophysics a magnetic anomaly is a local variation in the earth s magnetic field resulting from variations in the chemistry or magnetism of the rocks. The magnetic variation in successive bands of ocean floor parallel with mid ocean ridges is important evidence supporting the theory of.

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Marine magnetic anomalies typically represent 1 percent of the total geomagnetic field strength.

Magnetic anomaly stripes on ocean floors.

Plate tectonics and reversals of the earth s magnetic field are responsible for the magnetic stripes found on the ocean floor. Over time the earth s magnetic field reverses its north. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks. Magnetic striping magnetic minerals are found in rocks.

Among the new findings was the discovery of zebra stripe like magnetic patterns for the rocks of the ocean floor. Heirtzler magnetic anomalies in the indian ocean and sea floor spreading journal of geophysical research 10 1029 jb073i006p02101 73 6 2101 2117 2012. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor. A marine magnetic anomaly is a variation in strength of earth s magnetic field caused by magnetism in rocks of the ocean floor.

They can be stronger positive or weaker negative than the average total read more. 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. 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.

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