How much of the earth does the asthenosphere comprise?

How much of the earth does the asthenosphere comprise?

How much of the earth does the asthenosphere comprise?

How much of the earth does the asthenosphere comprise?

The asthenosphere is a part of the Earth’s upper mantle. The asthenosphere lies underneath the lithosphere which is the Earth’s rigid plates (plate techtonics). In a sense, the lithosphere floats on top of the asthenosphere. It is dense, and consists of some partially molten rock. It is considered a low velocity zone.The asthenosphere is located anywhere from 60-150 miles beneath the surface of the Earth. Please note that different sources will site different thicknesses, up to 450 miles thick. The asthenosphere will not be as thick in certain areas of the ocean such as ocean ridges.It is difficult to say how much of the Earth is made up of the asthenosphere because there is not a definite way to know how thick it actually is. It’s thickness also varies from area to area so this makes it very difficult as well.
How much of the earth does the asthenosphere comprise?
How much of the earth does the asthenosphere comprise?
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How much of the earth does the asthenosphere comprise?
Read More