Submarine slope degradation and aggradation and the stratigraphic evolution of channel-levee systems

D. M. Hodgson, C. N. Di Celma, R. L. Brunt, S. S. Flint

    Research output: Contribution to journalArticlepeer-review

    Abstract

    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. © The Geological Society of London.
    Original languageEnglish
    Pages (from-to)625-628
    Number of pages3
    JournalJournal of the Geological Society
    Volume168
    Issue number3
    DOIs
    Publication statusPublished - May 2011

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