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,
The Word for World Is Forest Word for World Is Forest" portrays a communication gap that the protagonists are never able to bridge. Both the native Athsheans and the loggers have languages that reflect their perceptions of reality, but they are unable to find a common language. In the native Athshean language, the word ""Athshe"" means both "forest" and "world", demonstrating the close link that the Athsheans have to the forest and their planet. It is noted by Lyubov that the Athsheans believe "the substance of their world was not earth, but forest". The language used by the Athsheans during conversations similarly show their interconnectedness and