GEOLOGY

Detailed explanation-1: -The asthenosphere is the denser, weaker layer beneath the lithospheric mantle. It lies between about 100 kilometers (62 miles) and 410 kilometers (255 miles) beneath Earth’s surface. The temperature and pressure of the asthenosphere are so high that rocks soften and partly melt, becoming semi-molten.

Detailed explanation-2: -The asthenosphere is part of the Earth’s layer known as the mantle. The asthenosphere itself is the upper portion of the mantle and extends from a depth of 50 to 120 miles, or 80 to 200 kilometers, below the surface of the Earth.

Detailed explanation-3: -The mantle is made up of a semi-molten rock called magma. The mantle can be split into two different sections which consist of the lower mantle, which is made from a more solid rock, which is hot enough to melt but stays solid due to the pressure pushing onto it.

Detailed explanation-4: -The upper mantle is called asthenosphere, “astheno” is a Greek word meaning ‘weak’. It is called weak layer because it is in liquid state where rock material deforms more readily, and magma formation takes place.

Detailed explanation-5: -The 3 main layers are the core, mantle and crust. The mantle is composed of the mesosphere and the asthenosphere and the uppermost part of the mantle. That uppermost part of the mantle is what is combined with the crust to make the lithosphere.