aaway from the mid-ocean ridge
The process in which the sea floor separates and moves in opposite directions is known as seafloor spreading. This occurs at mid-ocean ridges, where tectonic plates move apart, allowing magma to rise from the mantle and create new oceanic crust.
As the oceanic lithosphere moves away from a mid-ocean ridge, it cools and thickens. This process causes the ocean floor to become older and denser, resulting in its gradual subsidence. The farther it gets from the ridge, the deeper the ocean floor becomes due to the increased thickness and weight of the lithosphere.
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
Evidence that Earth's magnetic field changes can be found in the alignment of magnetic minerals in rocks on the ocean floor. As magma solidifies into new rock, the magnetic minerals within it align with the current magnetic field direction. By studying the alignment of these minerals in rocks of different ages along the ocean floor, scientists can track changes in the Earth's magnetic field over time.
Pieces of evidence for sea floor spreading include the presence of mid-ocean ridges where new crust is formed, symmetric magnetic striping on either side of mid-ocean ridges, age dating of oceanic crust that shows it gets older as it moves away from ridges, and the discovery of pillow basalts and other volcanic rocks on the ocean floor.
the tectonic plates under the earths surface
The process in which the sea floor separates and moves in opposite directions is known as seafloor spreading. This occurs at mid-ocean ridges, where tectonic plates move apart, allowing magma to rise from the mantle and create new oceanic crust.
tsunami
Strips of ocean-floor basalt record the polarity of earth's magnetic field at the time the rock formed. These strips form a pattern that is the same on both sides of the mid-ocean ridge. the pattern shows that ocean floor forms along mid-ocean ridges and then moves away from the ridge.
It spreads away form the ridges
sea floor spreading or divergent boudary
Mid ocean ridges are the direct result of sea floor spreading.
The mid-ocean ridge is almost in all of the oceans
which landforms are on the ocean floor
The topography of the ocean floor
As the oceanic lithosphere moves away from a mid-ocean ridge, it cools and thickens. This process causes the ocean floor to become older and denser, resulting in its gradual subsidence. The farther it gets from the ridge, the deeper the ocean floor becomes due to the increased thickness and weight of the lithosphere.
The ocean floor is not smooth.The ocean floor is made up of rocks, ledges and ditches.