"The outer limits of the floodplain are defined by the bluff-line, or valley wall. These are formed of steep slopes and sharp bluffs carved over centuries by a combination of the ever shifting meander of the rivers, violent flood waters and a barrage of winds. Being the driest areas of the floodplain, fires are also a major component of this habitat. Lightning storms have a habit of setting thse areas alight, and thus they are often seen in a state of regrowth. The ankylosaurs Denversaurus and Ankylosaurus can be found here occasionally, when they wander in from deeper inland."