Mass-Movement Causes: Changes in Slope AngleLClaessensauthorA J A MTemmeauthorJ MSchoorlauthorThis chapter discusses and illustrates how changes in slope angle can cause mass movement. Several processes can cause removal of lateral or underlying support of a slope, and most of the time multiple processes are acting together on a landscape. Slow and sudden processes causing changes in slope angle are differentiated, and several examples and illustrations of each are given. In addition, this chapter reviews current literature on landscape evolution modeling in which researchers try to incorporate these geomorphological processes in the analysis and simulation of current and future landscapes.Soil ScienceAgriculture-Farming, Production, Technology, Economics2013Elsevier Book Section