“…Smalley and coworkers, argue that glacial grinding is the only mechanism that can produce signifi cant amounts of silt-sized particles (Smalley, 1966(Smalley, , 1995Smalley and Vita-Finzi, 1968;Smalley and Krinsley, 1978). Other researchers conclude that silt-sized particles can be produced by a variety of processes, including frost weathering, salt weathering, chemical weathering, and fl uvial and eolian comminution (Nahon and Trompette, 1982;Whalley et al, 1982;McTainsh, 1987;Dutta et al, 1993;Wright et al, 1998;Wright, 2001aWright, , 2001bSmith et al, 2002).…”