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Which process adds more crust to the ocean floor?
Mid-ocean ridge spreading adds more crust to the ocean floor compared to subduction zones. At mid-ocean ridges, new crust is constantly created as magma rises and solidifies at the spreading center, pushing the older crust outward. Subduction zones involve the destruction of oceanic crust as it is pulled beneath a tectonic plate.
What types of volcanoes are formed at spreading centers?
Volcanoes at spreading centers is referred to as spreading center volcanism. This usually takes place on mid-oceanic ridges where the plates diverge.
What happens to the age of the rocks of the sea floor as you travel from a spreading center towards a coast line?
As you travel from a spreading center towards a coastline, the age of the sea floor rocks increases. Newly formed rocks at the spreading center are younger, while older rocks are found further away from the center, as they have been pushed away over time by the continuous process of seafloor spreading. This results in a pattern where the youngest rocks are closest to the ridge, and the oldest are nearer to the continental margins.
How do the differences in density and temperature provide some of the force needed to cause seafloor spreading and subduction?
Temperature differences in the mantle cause convection currents. These currents cause molten rock to erupt through the valley that runs along the center of the midocean ridge. As more material erupts, the sea floor spreads, cools, and becomes denser. The denser material sinks back into the mantle when it reaches a trench.
Why the focus of earthquakes can be very deep subduction boundaries?
Subducted crust is brought to the point of melting as it enters the mantle. As a liquid highly entrained with gas, it will attempt to rise through any weak points in the crust. When it reaches the surface, it will form a volcano.
What is the difference between a mid oceanic ridge and a subduction zone?
A subduction zone occurs at convergent plate margins where an oceanic plate is going underneath a continental plate or a less dense oceanic plate. A mid-ocean ridge is a divergent plate boundary on the ocean floor with a mountain range and a rift running through the center of it. Sea floor spreading also occurs at mid ocean ridges.
What is a spreading center on the ocean floor?
sea floor-spreading..;)
Name one spreading center?
The Mid-Atlantic Ridge is a spreading center located in the middle of the Atlantic Ocean.
Which process adds more crust to the ocean floor?
Mid-ocean ridge spreading adds more crust to the ocean floor compared to subduction zones. At mid-ocean ridges, new crust is constantly created as magma rises and solidifies at the spreading center, pushing the older crust outward. Subduction zones involve the destruction of oceanic crust as it is pulled beneath a tectonic plate.
What do you call the origin or the center of the earthquakes?
Epicentre
Why are there fewer earthquakes in the center of the US than on the west coast?
Because the water attracts earthquakes
What a spreading center and what is made at one?
Sea floor spreading 2 oceanic plates coming apart
What is another name for spreading center?
divergent plate boundary
Why does a shallow hypo center generate stronger earthquakes than an deep hypo center?
I know
What types of volcanoes are formed at spreading centers?
Volcanoes at spreading centers is referred to as spreading center volcanism. This usually takes place on mid-oceanic ridges where the plates diverge.
Are most earthquakes located near the edges or near the center of the continents?
Most earthquakes and volcanoes are on the Pacific rim of fire.
What is the difference between a revenue center and a support center?
what is the difference between revenue center and suport center
