The Zambezi Channel: A new perspective on submarine channel evolution at low latitudes
2017; Elsevier BV; Volume: 286; Linguagem: Inglês
10.1016/j.geomorph.2017.02.014
ISSN1872-695X
AutoresErrol Wiles, Andrew Green, M. K. Watkeys, Wilfried Jokat,
Tópico(s)Geological and Geophysical Studies
ResumoSubmarine channels are not stand-alone systems. They are long-lived systems modified by imperceptibly slow processes and rapid gravity flows, in some part controlled by hinterland dynamics. The submarine Zambezi Channel, within the Mozambique Channel, receives sediment from the Zambezi River catchment which has a dynamic tectonic and morphological history. Using recently collected multibeam bathymetry and PARASOUND data we discuss the geomorphology of the Zambezi Channel. Results show this system to be distinct in geomorphologic character when compared to other low-latitude submarine channels, sharing similarities with high-latitude systems. We propose a new, source-to-sink, hypothesis for the evolution of the Zambezi Channel, taking in to consideration hinterland tectonics, palaeo-lake development, river capture and rapid gravity flows. This hypothesis accounts for the unique present-day anatomy of the Zambezi Channel within the dynamic framework of the systems regional setting.
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