* Composition: The lithosphere is made up of the Earth's crust and the uppermost part of the mantle. The composition of the crust varies significantly depending on whether it's oceanic crust (primarily basalt) or continental crust (primarily granite).

* Thickness: The lithosphere is thicker under continents (up to 200 km) and thinner under oceans (about 65 km).

* Age: The lithosphere is constantly being created and destroyed. New lithosphere is formed at mid-ocean ridges, while older lithosphere is subducted back into the mantle at plate boundaries. This means different parts of the lithosphere are of varying ages.

* Plate Tectonics: The lithosphere is divided into large tectonic plates that move and interact with each other. This movement causes earthquakes, volcanic eruptions, and mountain formation. The nature of these interactions varies greatly from one region to another.

In summary, the lithosphere is a dynamic and complex layer of the Earth with significant variations in its composition, thickness, age, and tectonic activity depending on the region of the world.