At the lithosphere-asthenosphere boundary — when temperatures reach 2,400 degrees Fahrenheit (1,300 degrees Celsius) — rocks take on a viscous nature and flow, albeit very slowly.

Below the lithosphere is the denser asthenosphere, stretching from the lithosphere-asthenosphere boundary (LAB) to about 255 miles beneath Earth’s surface. Here is where temperature and pressure cause ...

That's one conclusion from a new study by Rice University geophysicists who modeled flow in the 100-mile-thick layer of mantle that begins at the base of Earth's tectonic plates, or lithosphere.

The lithosphere is the rigid outermost layer of the Earth. It comprises two compositional units – the crust and the upper mantle. The movement of individual fragments of the lithosphere (the tectonic ...

New simulations of the asthenosphere find that convective cycling and pressure-driven flow can sometimes cause Earth's most fluid layer of mantle to move even faster than the ... or lithosphere.

For that, geologists turn more specific words that describe Earth’s mechanical layers—lithosphere and asthenosphere. “Imagine that you had a hot fudge brownie you had poked.

In contrast, if the asthenosphere is weak owing to volatile enrichment3,4,5,6 or the presence of partial melt7, the lithosphere–asthenosphere boundary could occur over a much smaller depth range.

The Crust-Mantle and Lithosphere-Asthenosphere Boundaries: Insights from Xenoliths, Orogenic Deep Sections, and Geophysical Studies edited by Gianluca Bianchini, Jean-Louis Bodinier, Roberto Braga ...

Additionally, they note, "At greater depths, the lithosphere-asthenosphere boundary (LAB) represents a first-order structural discontinuity that accommodates differential motion between the tectonic ...

The lithosphere is physically distinct from the below-lying layers due to its cool temperatures and typically extends 70-100 km in depth. Below the lithosphere is the asthenosphere layer, ...