New oceanic crust is formed when volcanic activity disrupts the seafloor at the mid- ocean ridge. When this occurs it is referred to as oceanic spreading.
New seafloor is created at mid-ocean ridges, where tectonic plates are moving apart. As the plates separate, magma from the mantle rises to the surface, solidifies, and forms new crust. This process is known as seafloor spreading.
Magnetic striping on the ocean floor is used as evidence for seafloor spreading. As new oceanic crust forms at mid-ocean ridges, Earth's magnetic field is recorded in the rocks in alternating patterns of normal and reversed polarity. This provides support for the idea that new crust is continuously being created at mid-ocean ridges and spreading away in opposite directions.
Earthquake patterns, including their depth and distribution, can provide evidence of sea floor spreading by showing a concentration of earthquakes along mid-ocean ridges where new oceanic crust is being formed. As tectonic plates diverge and new crust is created, stress builds up and is released through earthquakes. The pattern of earthquakes along mid-ocean ridges provides a visual representation of the tectonic activity associated with sea floor spreading.
A mid-ocean ridge is created in the rift of a spreading sea floor. It is a continuous underwater mountain range formed by the separation of tectonic plates. Magma rises to the surface, creating new crust which pushes the existing plates apart.
True. Magnetic stripes on the ocean floor are created by alternating bands of magnetic polarities in the oceanic crust. These stripes are evidence of seafloor spreading where new crust is formed at mid-ocean ridges, pushing older crust away. Subduction zones are where older crust sinks back into the mantle.
antartica
New sea floor is being created at mid oceanic ridges.
At Mid-Ocean Ridges.
Mid-oceanic ridges are created where sea floor spreading takes place. These are called divergent boundaries and mark places where new sea floor is being created. They are tectonically active regions and can be characterized by undersea vents where magma comes up and cools quickly because of its contact with very cold water.
Sea floor spreading causes this. As the floor spreads apart new magma is being pushed up through the ridge from the mantle through convection currents. It's like a recycling system.
No. While new sea floor is being made in one place, at other places it is being destroyed, the diameter of the earth therefore remains constant overall.
Ocean floor
the ridges
New ocean floor is being created, pushing the Americas away from Europe and Africa.
new land is formed
the places she lives in
Seafloor Spreading created by harry hess