There is no formal definition, and source-bordering dunes (SBD) are not listed in the Encyclopedia of Geomorphology (Goudie 2004). The term SBD generally describes a dune closely bordering the leeside of its sediment source (Page et al. 2001), but more specifically, it has been applied to sand dunes downwind of sand bed rivers (Page 1971; Bullard and McTainsh 2003).
A type of dune
SBDs develop from deflation out of a sediment source and deposition parallel to its margin resulting in dune forms, which are oriented transverse to the main wind direction (Bullard and McTainsh 2003).
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