Not far from the camp, they reached a rock outcropping.
Finally they descended into a low place in the ravine, momentarily putting an outcropping between them and the Indians who waited.
He dropped the camera and peered over the edge of the cliff but the outcropping blocked his view of anything below.
The general character of the landscape in the Eastern Division is a succession of steep escarpments formed by the edges of the outcropping beds of harder rock, and long gentle slopes or plains on the dip-slopes, or on the softer layers; clay and hard rock alternating throughout the series.
A large outcropping of rock made it impossible for a climber more than just a few feet below the edge, to see anyone above him.