To know topography and possible hiding places for submarines.
Magnetic surveys of the ocean floors reveal.
Plate tectonics states that.
It is suggested that the entire history of the ocean basins in terms of oceanfloor spreading is contained frozen in the oceanic crust.
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.
As it expands it cools.
As hot mantle rises it expands.
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.
The concept of seafloor spreading states that.
Magnetic surveys of the ocean floor reveal.
Magnetic surveys of the ocean floors reveal.
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.
Alternating stripes of normal and reversed polarity paralleling the mid atlantic ridge.
Salt domes were created when regions in the ocean repeatedly dried out.
D all of the above.
Plate tectonics states that.
Seafloor is created at mid ocean ridges and destroyed at deep ocean trenches.
B thin oceanic crust composed of basaltic rocks.
Why is it so important to survey the ocean floors.
Magnetic surveys of the ocean floors reveal alternating strips of normal and reversed polarity paralleling the mid atlantic ridge divergent boundaries are areas of.
The magnetic variation in successive bands of ocean floor parallel with mid ocean ridges is important evidence supporting the theory of.
A seismic survey may make use of both shipboad measurements and measurements from an array of ocean bottom seismometers.
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.
Alternating stripes of normal and reversed polarity paralleling the mid ocean ridge.
C that reversed polarity is rare.
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.
The concept of seafloor spreading states that.
Alternating stripes of normal and reversed polarity paralleling the mid atlantic ridge.
Features in the seafloor layers indicating that oil and gas might be contained in the rocks include salt domes and seeps.
Magnetic surveys of the ocean floor reveal.
In a reconstruction of earth s geologic past the continents of africa and south america fit best along the.
