At constructive plate margins, mid-ocean ridges will be formed. As the plates move apart (very slowly), magma rises from the mantle The mantle is a layer inside a terrestrial planet and some other rocky planetary bodies. For a mantle to form, the planetary body must be large enough to have undergone the process of planetary differentiation by density. The mantle lies between the core below and the crust above.Mantle
Where are constructive boundaries found?
What happens when the plates move apart?
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Destructive plate margin - Plate tectonics - CCEA - BBC Bitesize
At destructive plate margins, subduction zones and ocean trenches will be formed. At a destructive boundary the plates are moving towards each other. This usually involves a continental plate and ...
Plate Tectonics - Processes and Landforms at Plate Margins
There are three types of plate margin: constructive, destructive and conservative.At each one there are distinctive landforms and events that characterise them.. Constructive. This margin can be found on land as well as in the centre of oceans. The processes occurring here are that the plates are being pulled apart in a pattern of divergence. ...
Plate tectonic theory – WJEC - BBC Bitesize
the plates slide past each other in opposite directions, or in the same direction but at different speeds. As the plates try and move, friction occurs and plates become stuck.
Mid-ocean ridge - ScienceDaily
Mar. 17, 2021 — Along submarine mountain ranges, the mid-ocean ridges, forces from the Earth's interior push tectonic plates apart, forming new ocean floor and thus moving continents about ...
What landforms are associated with constructive plate boundaries?
Landforms associated with constructive plate boundaries. Large scale landforms at a constructive plate boundary include: ocean ridges - such as the Mid-Atlantic ridge , where the Eurasian plate and the North Atlantic plate are moving apart from each other under the Atlantic Ocean.
How does a conservative plate boundary affect earthquakes?
Pressure builds up because the plates are still trying to move. When the pressure is released it sends out huge amounts of energy, causing an earthquake. The earthquakes at a conservative plate boundary can be very destructive as they occur close to the Earth's surface. There are no volcanoes at a conservative plate boundary.
What happens when the plates move over the mantle?
When this happens, the magma from the mantle rises up to make (or construct) a new crust. The movement of the plates over the mantle can cause earthquakes. Rising magma can also create shield volcanoes.
Why does pressure build up?
Pressure builds up because the plates are still trying to move. When the pressure is released it sends out huge amounts of energy, causing an earthquake. The earthquakes at a conservative plate boundary can be very destructive as they occur close to the Earth's surface.
How does magma create shield volcanoes?
Rising magma can also create shield volcanoes. Magma rises through the gap between the two plates, pushing them apart. A volcano forms on the Earth's crust at this point. Plate A would be the North American plate which is moving westwards, where plate B would be the Eurasian plate which is moving eastwards.
Is there a volcano at a conservative plate boundary?
There are no volcanoes at a conservative plate boundary. A large scale landform found along a conservative plate boundary is a fault line. One of the most active fault lines in the world is the San Andreas fault line in California, USA. The San Andreas fault. previous.
What happens to the plate as the mantle convection currents diverge?
cracks. As the mantle convection currents diverge, the plate is gradually pulled
Why do crust blocks sink?
blocks of crust start to sink downwards (subside) due to gravity. Think
Where is magma in the Rift Valley?
In the centre of the rift valley, magma from the underlying asthenosphere
What is the term for the pressure on the upper mantle?
confining pressure on the upper mantle (known as mantle decompression)
What part of the mantle does current spread outwards?
mantle. As the currents reach the upper part of the mantle, they spread outwards
Where do diverging currents drag?
At the same time, the diverging currents drag on the bottom of the plate, also
Which part of the mantle is still subsiding?
central part, which is still subsiding. Magma from the underlying mantle feeds
Where are constructive boundaries found?
Constructive boundaries tend to be found under the sea, e.g. the Mid Atlantic Ridge.
What happens when the plates move apart?
At constructive plate margins, mid-ocean ridges will be formed. As the plates move apart (very slowly), magma rises from the mantle. The magma erupts to the surface of the Earth. This is also accompanied by earthquakes. When the magma reaches the surface, it cools and solidifies to form a new crust of igneous rock.
