Interpretations and common challenges of aeolian records from North American dune fields

OSLdating and luminescence characteristics of aeolian deposits and their source material in Dalarna, central Sweden

“…Similar results regarding the timing of dune formation have also been gained from two relatively nearby dune fields, Brattforsheden and Starmoen (Fig. 1A), 160 km S and W, respectively, from Bon€ asheden (Alexanderson & Fabel 2015;Alexanderson & Henriksen 2015), as well as from dune fields in other previously glaciated areas (Hilgers 2007;Munyikwa et al 2011;Halfen et al 2015). Just after deglaciation, the climate was fairly cold, (katabatic) winds were strong, vegetation was scarce or non-existent, and plenty of sand was available in newly exposed glacifluvial deposits, all factors that promote sand drift and dune formation (Pye & Tsoar 2012).…”

“…A long duration of dune formation has also been the case in northern Sweden and Finland, where dune activity continued for several thousand years after deglaciation, and where the dunes generally show a stronger impact of the vegetation by being parabolic in shape and containing several palaeosols (Sepp€ al€ a 1972;K€ ayhk€ o et al 1999). In parts of North America, dunes seem to have been more or less completely reworked during later events and display sediment ages that are younger than the deglaciation (Halfen et al 2015). In contrast, the dunes in our study area show little evidence of significant reworking.…”

“…; Halfen et al . ). Just after deglaciation, the climate was fairly cold, (katabatic) winds were strong, vegetation was scarce or non‐existent, and plenty of sand was available in newly exposed glacifluvial deposits, all factors that promote sand drift and dune formation (Pye & Tsoar ).…”

“…In parts of North America, dunes seem to have been more or less completely reworked during later events and display sediment ages that are younger than the deglaciation (Halfen et al . ). In contrast, the dunes in our study area show little evidence of significant reworking.…”

Late Quaternary aeolian sand deposition sustained by fluvial reworking and sediment supply in the Hexi Corridor — An example from northern Chinese drylands

“…Sediment supply and availability might have profound effects on aeolian sedimentation (Kocurek and Lancaster, 1999;Stauch et al, 2012Stauch et al, , 2014Telfer and Hesse, 2013;Nottebaum et al, 2014;Halfen et al, 2015). The role of fluvial activity has been shown to be an important factor for providing source material for aeolian transport (Langford, 1989;Clarke and Rendell, 1998;Bullard and Livingstone, 2002;Field et al, 2009).…”