“…Recent studies of mostly stabilized dune systems on the Great Plains such as in the Canadian Prairies (Wolfe et al, 2000(Wolfe et al, , 2002(Wolfe et al, , 2006, the Nebraska Sandhills (Muhs et al, 1997;Stokes and Swinehart, 1997;Goble et al, 2004;Forman et al, 2005;Miao et al, 2007), adjacent to the Republican River in southwestern Nebraska , near the Cimarron River in western Oklahoma (Lepper and Scott, 2005) and southwestern Kansas (Forman et al, 2008) register multiple eolian sand deposition events in the late Holocene. The latest eolian depositional events in the Nebraska Sand Hills Mason et al, 2004;Forman et al, 2005;Miao et al, 2007) and dune fields in western Oklahoma (Lepper and Scott, 2005) and southwestern Kansas (Forman et al, 2008) are associated with historic and prehistoric droughts in the past 1000 years.…”