Magnetic Ocean Floor

These patterns were unlike any seen for continental rocks.

Magnetic ocean floor.

Is created when weak magnetic forces in basalt grains add to the force produced by the earth s dipole. They can be stronger positive or weaker negative than the average total read more. A negative magnetic anomaly choose one. 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. A symmetrical pattern of positive and negative magnetic lines emanates from the mid ocean ridge. 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. Marine magnetic anomalies typically represent 1 percent of the total geomagnetic field strength.

It s 1 and 3 the person was right saying it was number 2 you where incorrect on saying it was 1 and 3. 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. These two things were the magnetic striping on the ocean floor and the age of seafloor rocks. The magnetic field that is produced by the oceans the molten core and rocks in the crust and upper mantle protects the planet from streams of charged particles known as the solar wind.

In the ocean floor the magnetization was orderly arranged in long strips. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The oceanic crust displays a pattern of magnetic lines parallel to the ocean ridges frozen in the basalt. Magnetic stripes and isotopic clocks oceanographic exploration in the 1950s led to a much better understanding of the ocean floor.

Magnetic evidence for seafloor spreading explains how magnetic polarity frozen into seafloor basalts reveals evidence for the creation of new seafloor at mid ocean ridges. Describes the sawtooth pattern of magnetic signal strength measured along the atlantic ocean seafloor. Is indicated when a magnetometer measures intervals of magnetism that are weaker than expected. The striped magnetic pattern develops because as oceanic crust pulls apart magma rises to the surface at mid ocean ridges and spills out to create new bands of 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.