Lithosphere-Asthenosphere boundary 100 km deep. Lithosphere-Asthenosphere boundary The Lithosphere-Asthenosphere boundary (LAB) represents a mechanical difference between layers in Earth’s inner structure. Earth’s inner structure can be described both chemically (crust, mantle, core) and mechanically. The Lithosphere-Asthenosphere boundary (referred to as the LAB by geophysicists) lies between Earth's cooler, rigid lithosphere and the warmer, ductile asthenosphere. The actual depth of the boundary is still a topic of debate and study, although it is known to vary according to the environment. The LAB is determined from the differences in the lithosphere and asthenosphere including, but not limited to, differences in grain size, chemical composition,
This Is What the Truth Feels Like outside the top 10. The following week, "This Is What the Truth Feels Like" dipped 54 positions, the week's largest drop. In Australia, the album debuted at number six, becoming her third consecutive top-ten solo album. "This Is What the Truth Feels Like" was the week's second highest debut, and was present for two weeks before departing the chart. On France's SNEP albums chart, it entered at number 44, becoming her lowest debut behind "The Sweet Escape"s peak at number 33. The album fared moderately well on Switzerland's Hitparade, where it became her second highest performing album, peaking at number