Geography key terms. Linked to 2013 pre-release material

Key Term: Definition: Reference:
Asthenosphere: A zone in the upper mantle of the planet where rocks Prosser et al,
become plastic and are easily deformed. Depth of Landmarks AS
100-350km Geography
Lithosphere: The rigid outer layer of the earth, comprising of the Prosser et al,
earth's crust and the solid…