Geomorphology

Cyclic steps and related supercritical bedforms: Building blocks of deep-water depositional systems, western North America

Cyclic steps are long-wave (the ratio of wavelength to height is ≫ 1), upstream-migrating, upper-flow-regime bedforms bounded by internal hydraulic jumps (i.e., transition from densimetric Froude supe…

Facies architecture of submarine channel deposits on the western Niger Delta slope: Implications for grain‐size and density stratification in turbidity currents

High‐resolution bathymetry, seismic reflection, and piston core data from a submarine channel on the western Niger Delta slope demonstrate that thick, coarse‐grained, amalgamated sands in the channel …

High-resolution, millennial-scale patterns of bed compensation on a sand-rich intraslope submarine fan, western Niger Delta slope

High‐resolution bathymetry, seismic reflection, and piston core data from a submarine channel on the western Niger Delta slope demonstrate that thick, coarse‐grained, amalgamated sands in the channel …

Development of cutoff-related knickpoints during early evolution of submarine channels

Submarine channels are often thought of as having relatively simple geometries, with significant along-channel morphologic and stratigraphic continuity. Using high-resolution seismic reflection data f…

The stratigraphic record of submarine-channel evolution

Submarine-channel systems record basin-margin sediment dispersal and can host signi cant natural resources.We review the facies architecture (i.e., facies heterogeneity and stacking patterns) of outcr…

Rapid Adjustment of Submarine Channel Architecture To Changes In Sediment Supply

Changes in sediment supply and caliber during the last ∼ 130 ka have resulted in a complex architectural evolution of the Y channel system on the western Niger Delta slope. This evolution consists of …