plateau - choose a jigsaw puzzle to solve

In geology and physical geography a plateau ( , or ; plural plateaus or plateaux),is also called a high plain or a tableland, it is an area of a highland , usually consisting of relatively flat terrain that is raised significantly above the surrounding area , often with one or more sides with steep slopes. Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava , and erosion by water and glaciers. Plateaus are classified according to their surrounding environment as intermontane, Piedmont, or continental.