Looking back, the waterfall is tucked in the corner and you can't see it. Isn't that a lovely trail tread though. The Belt rocks of the Altyn and Appekunny formations comprise the cliffs. They are much more resistant to erosion than the weak Cretaceous strata underneath them (low hills covered in trees). The striking white layer in the Appekunny formation is a quartzite bed. For more about the geology, this is a great article: https://blogs.agu.org/mountainbeltway/2 ... onal-park/