Describe the symmetry elements of crust and mantle
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The mantle is the mostly-solid bulk of Earth’s interior. The mantle lies between Earth’s dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth’s total volume.
As Earth began to take shape about 4.5 billion years ago, iron and nickel quickly separated from other rocks and minerals to form the core of the new planet. The molten material that surrounded the core was the early mantle
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As Earth began to take shape about 4.5 billion years ago, iron and nickel quickly separated from other rocks and minerals to form the core of the new planet. The molten material that surrounded the core was the early mantle
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CRUST
It is the outermost solid part of the earth, normally about 8-40 kms thick.
It is brittle in nature.
Nearly 1% of the earth’s volume and 0.5% of earth’s mass are made of the crust.
The thickness of the crust under the oceanic and continental areas are different. Oceanic crust is thinner (about 5kms) as compared to the continental crust (about 30kms).
Major constituent elements of crust are Silica (Si) and Aluminium (Al) and thus, it is often termed as SIAL (Sometimes SIAL is used to refer Lithosphere, which is the region comprising the crust and uppermost solid mantle, also).
The mean density of the materials in the crust is 3g/cm3.
The discontinuity between the hydrosphere and crust is termed as the Conrad Discontinuity
MANTAL
The portion of the interior beyond the crust is called as the mantle.
The discontinuity between the crust and mantle is called as the Mohorovich Discontinuity or Moho discontinuity.
The mantle is about 2900kms in thickness.
Nearly 84% of the earth’s volume and 67% of the earth’s mass is occupied by the mantle.
The major constituent elements of the mantle are Silicon and Magnesium and hence it is also termed as SIMA.
The density of the layer is higher than the crust and varies from 3.3 – 5.4g/cm3.
The uppermost solid part of the mantle and the entire crust constitute the Lithosphere.
The asthenosphere (in between 80-200km) is a highly viscous, mechanically weak and ductile, deforming region of the upper mantle which lies just below the lithosphere.
The asthenosphere is the main source of magma and it is the layer over which the lithospheric plates/ continental plates move (plate tectonics).
It is the outermost solid part of the earth, normally about 8-40 kms thick.
It is brittle in nature.
Nearly 1% of the earth’s volume and 0.5% of earth’s mass are made of the crust.
The thickness of the crust under the oceanic and continental areas are different. Oceanic crust is thinner (about 5kms) as compared to the continental crust (about 30kms).
Major constituent elements of crust are Silica (Si) and Aluminium (Al) and thus, it is often termed as SIAL (Sometimes SIAL is used to refer Lithosphere, which is the region comprising the crust and uppermost solid mantle, also).
The mean density of the materials in the crust is 3g/cm3.
The discontinuity between the hydrosphere and crust is termed as the Conrad Discontinuity
MANTAL
The portion of the interior beyond the crust is called as the mantle.
The discontinuity between the crust and mantle is called as the Mohorovich Discontinuity or Moho discontinuity.
The mantle is about 2900kms in thickness.
Nearly 84% of the earth’s volume and 67% of the earth’s mass is occupied by the mantle.
The major constituent elements of the mantle are Silicon and Magnesium and hence it is also termed as SIMA.
The density of the layer is higher than the crust and varies from 3.3 – 5.4g/cm3.
The uppermost solid part of the mantle and the entire crust constitute the Lithosphere.
The asthenosphere (in between 80-200km) is a highly viscous, mechanically weak and ductile, deforming region of the upper mantle which lies just below the lithosphere.
The asthenosphere is the main source of magma and it is the layer over which the lithospheric plates/ continental plates move (plate tectonics).
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