| Abstrakt: |
During the late Quaternary, the world΄s major deserts experienced dramatic changes in the nature and frequency of aeolian processes (Fig. 26.1). Sand seas (ergs) cover 5% of the global land surface and reveal evidence of repeated phases of dune formation (Thomas et al. 2005). This paper presents a review of dune-building episodes during late Quaternary time and their palaeoclimatic significance. The emphasis of the paper is on African and North American sand seas. Although beyond the scope of this paper, a more detailed synthesis and chronologies of global sand seas is presented by Tchakerian (1999), Goudie (2002), Munyikwa (2005) and Lancaster (2007). [ABSTRACT FROM AUTHOR] |
