WebAnswer (1 of 5): Oceanic lithosphere is typically about 50-100 km thick (but beneath the mid-ocean ridges is no thicker than the crust). Continental lithosphere is thicker (about 150 km). It consists of about 50 km of crust and 100 km or more of uppermost mantle. Harshita, hope this answer helps...

Earth

The asthenosphere (from Ancient Greek ἀσθενός (asthenós) 'without strength') is the mechanically weak and ductile region of the upper mantle of Earth. It lies below the lithosphere, at a depth between ~80 and 200 km (50 and 120 mi) below the surface, and extends as deep as 700 km (430 mi). However, the lower … See more The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments. It is composed of peridotite, a rock containing mostly the minerals See more The asthenosphere extends from an upper boundary at approximately 80 to 200 km (50 to 120 miles) below the surface to a lower boundary at a … See more Decompression melting of asthenospheric rock creeping towards the surface is the most important source of magma on Earth. Most of this erupts at mid-ocean ridges to form the distinctive mid-ocean ridge basalt (MORB) of the ocean crust. Magmas are also generated by … See more • San Diego State University, "The Earth's internal heat energy and interior structure" Archived 3 March 2011 at the Wayback Machine See more The mechanical properties of the asthenosphere are widely attributed to the partial melting of the rock. It is likely that a small amount of … See more • Seismology § History See more • Hirschmann, Marc M. (March 2010). "Partial melt in the oceanic low velocity zone". Physics of the Earth and Planetary Interiors. 179 (1–2): … See more Web24 Sep 2024 · The asthenosphere is the ductile part of the earth just below the lithosphere, including the upper mantle. The asthenosphere is about 180 km thick. Why does the lithosphere vary in thickness? As the oceanic lithosphere cools, undepleted mantle becomes part of the lithospheric column and its thickness increases with age. james tierney narragansett town manager

(PDF) Age‐Independent Oceanic Plate Thickness and …

Web1 Oct 2012 · The flow rate in the asthenosphere depends on the thickness of the asthenospheric channel accommodating the flow. For simple Poiselle flow in a homogeneous layer of thickness H, the excess flow, u, will follow the form. where u ave is defined by U/H, and z equals zero at the channel midpoint. Assuming mobilization … WebAsthenosphere: Directly below the lithosphere lies a section of the upper mantle known as the asthenosphere. The asthenosphere is about 200 km (approximately 124 miles) thick. … WebThe layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere. The asthenosphere is the part of the mantle that flows and moves the plates of the Earth. The Mantle The mantle is the layer located directly under the sima. It is the largest layer of the Earth, 1800 miles thick. james tieman south bend