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because the oceanic plate is more heavier than contental plate so the oceanic plate sinks under the contental.
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New crust is being made at ocean ridges. Why is it that earth never gets any bigger?
Because - the edges of the continental plate are being pushed back into the earth - where the temperature is hot enough to melt the earth.
What are the 8 steps that take place in a volcanic eruption?
1. Destructive plate boundaries. The oceanic crust is heavy and the continental crust is not heavy so sometines the oceanic crust sinks to the mantle and the magma chamber beneath. 2. This procedure has created extra lava in the mantle. This magma (lava) must come out somewhere this is where volcano's come into it. 3. After a while too much magma builds up this causes volcanic eruptions. 4. You will hear grumbling and ash will be released before an eruption. 5. During the eruption lava will shoot out of the volcano and volcanic rock. Pyroclastic clouds may come out of a violent volcano. 6. Steam gas and dust are dispersed out of the volcano lava will run down the sides. The thickness of the lava changes the shape of it, runny lava will make a flat volcano and thick lava will make your typical cone shaped volcano. Sorry there are only 6 steps here :) There are 3 different types of volcanoes: -Dormant = Has not erupted for a very long time-sleeping volcano -Active = Erupting all the time -Extinct = Will never erupt again. Hope this helps!:)x
Why do you think that Wegener was unable to prove the theories of continental drift and plate tectonics before his death in 1930?
i think he was unable to prove his statements because he has never seen this happen
What layer of the earth have humans drilled into the earth?
Humans have never drilled past the crust into the mantle. We have, however, seen the mantle through "hot spots" like volcanoes where the mantle is closer to the surface.
What is the start up time for geothermal power station?
Geothermal power stations are built by digging into the Earth's crust and tapping into the direct heat that is never ending. It generally takes around nine months to start a geothermal power station.
What means the ocean is pulled under the continent?
The ocean is never pulled under the continent. Oceanic crust--the rock and some sediments, however, slide under the edges of continental crust and are pushed downward toward the mantle in areas of oceanic to continental plate collisions.
Why are continental plates are made up of older rocks?
Continental Plates are made of old rocks because they are never created or destroyed. For example, when an earthquake occurs, it can be caused by one tectonic plate going underneath another. The plate that goes underneath is always an oceanic plate because the rock is of a higher density. So, in summary, continental plates are lighter than oceanic crust, so they are never destroyed (hence why they are made of old rock).
Why is the oldest ocean crust only 150 million years old?
Because the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
What are the rules of plate tectonics?
1. Continental crust is less dense, or lighter, than Oceanic crust so it doesn't sink. It is never destroyed and is permanent. 2. Oceanic crust is heavier so it can sink below Continental crust. It is constantly being formed and destroyed at ocean ridges and trenches. 3. Continental crust can carry on beyond the edges of the land and finally end far below the sea. This explains why the edges of all the continents don't have deep trenches right up against their coastlines. 4. Plates can never overlap. This means that they must either collide and both be pushed up to form mountains, or one of the plates must be pushed down into the mantle and be destroyed. 5. There can never be gaps between plates, so if two plates move apart, as in the middle of the Atlantic, new rock will be formed to fill the space. 6. We know the Earth isn't getting bigger or smaller, so the amount of new crust being formed must be the same as the amount being destroyed.
What is similarities tectonics and theory of the continental drift?
Tectonics is the large scale processes effecting the crust. The large scale process that is accepted to be occurring is plate tectonics (crust separated into plates that move and interact). The theory of continental drift suggested that continents moved however it never proposed a mechanism, plate tectonics is that mechanism that explains what alfred wegener saw. So back to your question similarities between what i think you mean modern tectonics i.e. plate tectonics and continental drift is that they both suggest the crust is moving.
How does a volcano form near a subduction zone?
First, at a subduction zone, old stiff oceanic crust dives under a less dense continental plate boundary. Next, the old oceanic crust melts, becoming less dense and floating towards the top of continental crust. After many years, a build up of the molten material bursts to the surface as volcanic activity. --------------------------------------------------------------------------------------- The point is that the sinking plate is wet and the water in the rocks facilitates a process of partial melting of the wet rocks as they begin to get warmed up again. This produces special acidic magmas which means that the volcanoes and magmas produced in the subduction zones is not the same as tcanrieenkhgengrehat produced in the constructive plate margins. the chicken is being saves by a person from the vol
New crust is being made at ocean ridges. Why is it that earth never gets any bigger?
Because - the edges of the continental plate are being pushed back into the earth - where the temperature is hot enough to melt the earth.
When did the Continental Army end?
The Continental army never ended, but the war (Revolutionary War) did.
What do we know about what it looks like beneath the earth's crust?
You will never know what it look like under the earth's crust :)
Does Bakers Square pie crust contain lard?
According to one of the discussions on vegguide.org, Baker's Square pies, "...are never made with lard and the crust is made with shortening."
What time of year do hammerheads hibernate?
Hammerheads never hibernate. They migrate, but never hibernate. They are not like bears or frogs, but rather great predatory fish that keep to warm oceanic waters.
What is unique about the Continental Restaurant in Philadelphia?
What is unique about the Continental Restaurant is that the eatery is never closed. The Continental restaurant is opened twenty-four hours a day and provides quality service no matter the time of the day or the time of the night.
