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 boundary of the asthenosphere is not well defined. WebSep 29, 2024 · Asthenosphere comes from the Ancient Greek word asthenos meaning "without strength" or "weak." This is because the asthenosphere is highly viscous and ductile. This is because the …

Asthenosphere definition and meaning Collins English Dictionary

WebJul 23, 2024 · The lithosphere is the rigid, outermost layer of the Earth's rocks and minerals, which consists of the crust and upper mantle. The term "lithosphere" comes from the Greek word litho, which means ... Webthe process in which a tectonic plate dives beneath another tectonic plate and into the asthenosphere cyenopyrafen 30% sc

Lithosphere - National Geographic Society

WebMeaning of asthenosphere. What does asthenosphere mean? Information and translations of asthenosphere in the most comprehensive dictionary definitions resource … Webthe rigid outer layer of the earth, having an average thickness of about 75 km and comprising the earth's crust and the solid part of the mantle above the … Web2.12.1.1.1 Lateral variation of asthenosphere viscosity. As an example, here we illustrate how the activation volume helps constrain the lateral variations in asthenosphere viscosity. We define the asthenosphere viscosity as the lowest viscosity in the upper mantle in a … cyeon