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,
Rikki and the Last Days of Earth "When the history of the new wave finally started to get written, Rikki and the Last Days of Earth were conspicuous by their absence. No one remembered; nobody cared. Yet without them, a lot of what is now taken for granted about the early '80s might never have occurred". Rikki and the Last Days of Earth Rikki and the Last Days of Earth (formerly Rikki and the Last Days on Earth) were an early British punk group. They were chronicled in 's book "". "Billboard" credited them with paving the way for 1980s new romantic acts. The band was formed