Figure 9b: Foredune ridges from the mid-section of the Clatsop subcell. The foredune-ridges range in heights from two to 20 m above intervening valleys. The ridges occur is sets, as those shown west (figure left) and east (figure right) of Sunset Lake (photo foreground)(Rankin, 1983; Reckendorf et al., 2001). Oblique air-photograph view North-East.