Magnetic Surveys Of The Ocean Floors Reveal

Magnetic surveys of the ocean floors reveal a alternating stripes of normal and reversed polarity paralleling the mid atlantic ridge.

Magnetic surveys of the ocean floors reveal.

As it expands it cools. Variations in the intensity and polarity of earth s magnetic field are considered to be recorded in the remanent magnetism of the igneous rocks as they solidified and cooled through the curie temperature at the crest of an oceanic ridge and subsequently. To know topography and possible hiding places for submarines. Magnetic surveys of the ocean floor reveal.

Newly formed mineral grains on the ocean floor are magnetized according to the new orientation of the magnetic field. Alternating stripes of normal and reversed polarity paralleling the mid atlantic ridge. C that reversed polarity is rare. Seafloor is created at mid ocean ridges and destroyed at deep ocean trenches.

The magnetic variation in successive bands of ocean floor parallel with mid ocean ridges is important evidence supporting the theory of. D all of the above. Magnetic surveys of the ocean floors reveal alternating strips of normal and reversed polarity paralleling the mid atlantic ridge divergent boundaries are areas of. Seafloor is created at mid ocean ridges and destroyed at deep ocean trenches.

Each consist of three sheets a base bathymetric map a magnetic map and a gravity map and where practicable a sediment overprint nos 1308n 17s. In a reconstruction of earth s geologic past the continents of africa and south america fit best along the. Why is it so important to survey the ocean floors. Magnetic surveys of the ocean floors reveal.

A seismic survey may make use of both shipboad measurements and measurements from an array of ocean bottom seismometers. It is suggested that the entire history of the ocean basins in terms of oceanfloor spreading is contained frozen in the oceanic crust. Alternating stripes of normal and reversed polarity paralleling the mid atlantic ridge. Plate tectonics states that.

Salt domes were created when regions in the ocean repeatedly dried out. Magnetic surveys of the ocean floor reveal. Alternating stripes of normal and reversed polarity paralleling the mid ocean ridge. The bathymetric map when combined with the other three maps serves as a base for making geological geophysical studies of the oceans bottom s crustal geophysical data for the continental shelf.

The concept of seafloor spreading states that. Plate tectonics states that. Magnetic surveys of the ocean floor reveal. 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.

As hot mantle rises it expands. Features in the seafloor layers indicating that oil and gas might be contained in the rocks include salt domes and seeps.