Where earth s magnetic field changes polarity.
The youngest part of the ocean floor is found.
Near ocean ridges is defined as the study of the history of earth s magnetic field.
Where ocean sediments are thickest c.
Some cratons in canada and greenland shelter the oldest continental rocks in the world about 4 billion years old.
Plates slide past one another at.
It is composed of several layers not including the overlying sediment.
The downward part of a convection current causes a sinking force that.
This graphic shows several ocean floor features on a scale from 0 35 000 feet below sea level.
Near ocean ridges d.
Pulls tectonic plates toward one another.
The youngest part of the ocean floor is found.
The youngest part of the ocean floor is found.
The youngest crust of the ocean floor can be found near the seafloor spreading centers or mid ocean ridges as the plates split apart magma rises from below the earth s surface to fill in the empty void.
Continental shelf 300 feet continental slope 300 10 000 feet abyssal plain 10 000 feet abyssal hill 3 000 feet up from the abyssal plain seamount 6 000 feet.
Where earth s magnetic field changes polarity.
The oldest continental rocks are found in cratons.
The youngest part of the ocean floor is found at conservative plate boundaries where oceanic crust is pulled apart and magma rises from the mantle to form new oceanic crust.
Cratons are therefore always found within continents.
Oceanic crust the outermost layer of earth s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges which occur at divergent plate boundaries.
The following features are shown at example depths to scale though each feature has a considerable range at which it may occur.
The spreading however is generally not uniform causing linear features perpendicular to the divergent boundaries.
Oceanic crust is about 6 km 4 miles thick.
Because of this the youngest sea floor can be found along divergent boundaries such as the mid atlantic ocean ridge.
