cycle of erosion
n (Physical Geography) the hypothetical sequence of modifications to the earth's surface by erosion, from the original uplift of the land to the ultimate low plain, usually divided into the youthful, mature, and old stages
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014