n other places no such effect is visible. There are some water worn pebbles about 2 inches in diameter in upper part of the s.s. of material other than basalt. Upper part of basalt which forms the falls is much broken and has not reddened the overlying s.s., though likely an intrusive sheet, but the underlying portion of s.s. is reddened in a thin layer. Just below the upper falls where the sandstone disappears, the red band at its top is several feet thick. The sandstone is truncated thus, as best shown on the east side ((drawing in field book)) At noon we ate lunch, then took a refreshing bath in the pools below the upper fall. I started for camp at 2, Robbins having gone to the river before lunch and returned alone to where I was working at the falls. Almost every moment pebbles started from the cliffs by the breezes, fall to the bottom of the canyon.
