10.6084/m9.figshare.3452786 D.M. Hodgson D.M. Hodgson C.N. Di Celma C.N. Di Celma R.L. Brunt R.L. Brunt S.S. Flint S.S. Flint Submarine slope degradation and aggradation and the stratigraphic evolution of channel–levee systems Geological Society of London 2016 slope conduit evolution aggradation levee development Submarine slope degradation equilibrium profile shift erosion surface formation Geology 2016-06-21 08:30:56 Journal contribution https://geolsoc.figshare.com/articles/journal_contribution/Submarine_slope_degradation_and_aggradation_and_the_stratigraphic_evolution_of_channel_levee_systems/3452786 <p>Two seismic-scale submarine channel–levee systems exposed in the Karoo Basin, South Africa provide insights into slope conduit evolution. Component channel fills in a levee-confined channel system (Unit C) and an entrenched channel system (Unit D) follow common stacking patterns; initial horizontal stacking (lateral migration) is followed by vertical stacking (aggradation). This architecture is a response to an equilibrium profile shift from low accommodation (slope degradation, composite erosion surface formation, external levee development, sediment bypass) through at-grade conditions (horizontal stacking and widening) to high accommodation (slope aggradation, vertical stacking, internal levee development). This architecture is likely common to other channel–levee systems. </p>