When the axes of adjacent folds are inclined, their intersection with the
relatively flat ground surface results in the narrow sinusoidal shapes
evident in this photo. As shown in the three dimensional illustration (Hamblin
& Howard, 1975), drainage ways on the flanks of and across the ridges
produce "v's" in the strata outcrops. As shown in the illustration here
and in the monocline example, these "v's" point down dip of the strata.
Thus the "v's" point toward the long axis (up and down the screen in this
example) in a syncline and away from the axis in an anticline.