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What is the original definition for plate tectonics?
Originally it was thought that the earth's lithosphere (crust) was made of individual plates that are broken down into over a dozen large and small pieces of rock. These fragmented plates collided with, slid under or moved past adjacent plates. This is what shaped the earth's landscape.
Why do volcanos occur more at locations where two plates meet?
The reason this occurs is because of subduction. The heat of the plates rubbing causes magma to rise forcing through the lithosphere (or crust). Thus causing alot of volcanos over convergent plates.
What is the earth's layer of solid rock that flows under pressure?
The solid layer of the earth that can still flow is called the asthenosphere. This layer is located in the mantle of the earth the layer below the upper crust and lithosphere, home of the tectonic plates.
What do tectonic plates lay directly under what?
magma.
What is the thinnest under the oceans and thickest through the continents?
the earth's crust
Do the plates include the lithosphere under the oceans?
Yes. The surface of earth covered by the oceans are part of the plates of the earth.
Do the Plates include the lithosphere under the ocean?
Yes, several of the plates have their margins under the oceans. The Pacific Plate would be the plate with the largest area under the seas.
What does oceanic plates mean?
Oceanic plates are sections of the Earth's lithosphere that form the bedrock beneath the world's oceans. These plates are typically denser and younger than continental plates, and they are constantly moving due to the process of plate tectonics. Subduction zones are often found at the boundaries where oceanic plates meet continental plates.
What are the earths plates made of?
parts of the crust and upper mantle
Rifting under water?
seperations of plates forming oceans
What is deformable rock under the lithosphere?
Deformable rock under the lithosphere is known as the asthenosphere. It is located beneath the rigid lithosphere and is composed of partially molten rock that allows for the movement of tectonic plates. The asthenosphere plays a key role in plate tectonics and the movement of Earth's crustal plates.
The layer directly under the Lithosphere?
The layer directly under the Lithosphere is the Asthenosphere. The Asthenosphere is a semi-fluid layer of the Earth's mantle that allows for the movement of the tectonic plates above it. It is hotter and more ductile compared to the rigid Lithosphere.
Is the crust a layer of rocks under the plate or is the crust the plates?
The crust is the layer at the surface that forms the upper part of the plates. The plates also include a portion of the upper mantle just beneath the crust. Together, the crust and this upper portion of the mantle form the lithosphere.
Is the oceanic lithosphere denser?
No. Oceanic plates are denser than conitnental plates.
Do oceanic plates lie under oceans?
yes
What are the plates under land areas called?
Land plates are called continental plates. Sea plates are called oceanic plates.
What do plates float on?
Plates float on the semi-fluid asthenosphere layer, which is part of the upper mantle. This layer is under the lithosphere and allows the movement of the tectonic plates.
