Fig. 7: Contrasting models for knickpoint migration.
From: Rapidly-migrating and internally-generated knickpoints can control submarine channel evolution
a Generalised pattern of erosion and deposition associated with upstream-migration of knickpoints. b Cyclic step model. Knickpoint is formed by repeated instabilities (termed cyclic steps) that are self-generated by supercritical turbidity currents going through a hydraulic jump. c Flow-induced slope-failure model. Knickpoint results from sudden failure of the channel floor, when loaded during passage of a turbidity current. d Oversteepening through undercutting in which erosion at the toe of the steep face causes oversteepening, and eventual failure.
