walked along the Ry. Central Leviston line to a little east of the small tunnel through the Medina - Cataract contact, and then back along the low situated Grand Rage Fault line to Whirlpool Rapids station. (1) I could all get at this zone in the precipitous cliff but from the down fallen material it looked to me like the thin bedded Medina sandstone. All of the lighter Cataract beds are here out.