High-resolution imaging of internal stratigraphy of linear dunes of the Namib Sand Sea

Researchers have identified distinct sedimentological phases within linear dunes of the Namib Sand Sea using high-resolution ground-penetrating radar (GPR). The study reveals an upward transition from an active superimposed dune migration phase to a planar laminated draping phase, separated by a notable erosional surface. This finding highlights changes in current directions and bedform accumulation patterns, as well as non-depositional and erosional events, which are critical for understanding the dynamic processes shaping these dunes. The study also integrates GPR data from a Pleistocene sub-aerial shoreline deposit in Utah (USA), demonstrating the applicability of this method across different depositional settings. Horizon-flattening techniques were used to accentuate changes in depositional regimes, offering insights that would otherwise be below the resolution of seismic methods.

McBride, J. H., Radebaugh, J., Chandler, C. K., & Keach, II, R. W. (2020). High-resolution imaging of internal stratigraphy of linear dunes of the Namib Sand Sea. SEG Technical Program Expanded Abstracts 2020, 1, 2619–2623. https://doi.org/10.1190/segam2020-3426004.1