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,
Iced Earth introduced the Something Wicked Saga, which was later expanded upon on 2007's "", and 2008's "". Iced Earth have also released several albums written around a theme. 2001's "Horror Show" was largely based on horror literature and films, 2004's "The Glorious Burden" was inspired by history and war, while 2011's "Dystopia" centered around dystopian themes in literature and film. Iced Earth Iced Earth is an American heavy metal band from Tampa, Florida. It was formed in 1984 under the name The Rose, then Purgatory by guitarist and main songwriter Jon Schaffer and original drummer Greg Seymour. Iced Earth released their