Punctuated aridity in southern Africa during the last glacial cycle: The chronology of linear dune construction in the northeastern Kalahari

Late Pleistocene tectonic-geomorphological development within a passive margin — The Cariatá trough, northeastern Brazil

“…Following the evidence, we conclude that prevailing semi-arid conditions throughout the Late Quaternary would not explain the massive mudflows in Cariatá trough. This pattern is consistent with studies in southern Africa that points to climatic shifts and not a long-lasting arid period in the Late Pleistocene (e.g., Stokes et al, 1998).…”

Surface texture analysis of southern Tuli Basin sediments: Implications for Limpopo Valley geoarchaeological contexts

“…Such dates correspond well with suggested phases of dune building and dune mobilization in the Kalahari at $23-27 ka and $12-15 ka (e.g. Thomas et al, 1997;Stokes et al, 1998;Thomas and Shaw, 2002;Telfer and Thomas, 2006;Stone and Thomas, 2008). Regional anti-clockwise sand flow patterns, which would have been concomitant with late Quaternary wind circulation patterns across the central interior of southern Africa (c.f.…”

The Southern Westerlies in Central Chile during the two last glacial cycles as documented by coastal aeolian sand deposits and intercalating palaeosols

“…Besides climate, wind speed and varying sediment supply through sea-level changes or river activity may have played a role in the alternating periods of soil development and sand accumulation (Pye, 1982;Pye and Tsoar, 1990;Clapperton, 1993;Lancaster, 1995;Stokes et al, 1997Stokes et al, , 1998Radies et al, 2004;Chase and Thomas, 2006a,b).Today, wind speed of 6.5-7.5 m s −1 as the monthly mean along the Norte Chico is high enough to transport fine to medium sand, as dominates in the palaeodunes (Table 2). Increasing wind speed would not greatly change, and only intensify, sand transport in areas where dune formation already takes place today, such as north of river mouths.…”