“…Kutzbach, 1987). These combined factors led to pronounced slope erosion in some areas (e.g., Gunn,1997: p.145;King and King,1996: p. 80;Knox,1984;McMillan and Klippel, 1981;Saucier, 1994: p. 43;Schuldenrein, 1996: p. 3;Styles et al, 1983). One argument arising from this scenario involves whether gravel beds in rivers would have been silted over, reducing lithic raw material availability (e.g., Bense, 1987a;McGahey, 1999: pp.…”