Submarine channels controlled by salt tectonics: Examples from 3D seismic data offshore Angola

Knickpoint migration in submarine channels in response to fold growth, western Niger Delta

“…Depocentres forming upstream of diapirs are known in other submarine systems (e.g. Adeogba et al, 2005;Gee and Gawthorpe, 2006). Deposition upstream of anticlinal folds and formation of knickpoints downstream of them has also been documented in some fluvial systems, e.g., Wheeler Ridge (Burbank et al, 1996) and Kabul River (Burbank and Anderson, 2001).…”

Confined channel-levee complex development in an elongate depo-center: Deep-water Tertiary strata of the Austrian Molasse basin

“…The effects of basin configuration and seafloor topography on gravity flow deposit character and distribution in deep-water environments are significant (e.g., Webb, 1981;Prather et al, 1998;Steffens et al, 2003;Lomas and Joseph, 2004;Gee and Gawthorpe, 2006). Many deep, elongate basins, such as some forelands, have been shown to be dominated by currents focused along narrow basin axes (e.g., Ricci-Lucchi, 1986;Sinclair, 1997;Mutti et al, 2003); the large-scale foredeep architecture imparts a strong influence on depositional system development and associated sediment distribution (e.g., Winn and Dott, 1979;Sinclair, 1994;McCaffrey et al, 2002;Hubbard et al, 2008).…”

Migration–aggradation history and 3-D seismic geomorphology of submarine channels in the Pleistocene Benin-major Canyon, western Niger Delta slope

“…The recent proliferation of three-dimensional (3-D) seismic datasets from deep-water settings has led to a new generation of submarine channel studies that, despite generally limited published long-core calibration, provide detailed information about the range of channel architectures and evolutionary histories (e.g. Mayall and Stewart, 2000;Pirmez et al, 2000;Kolla et al, 2001;Abreu et al, 2003;Deptuck et al, 2003;Posamentier and Kolla, 2003;Gee and Gawthorpe, 2006;Heinio¨and Davies, this volume). In this study we describe the architecture and evolution of channel deposits in the middle to upper fill of a 54 km long segment of the Pleistocene Benin-major Canyon, located off the western Niger Delta slope (Fig.…”