wall on the S.W. side. Further up the walls on both sides are practically vertical, with only a narrow bottom over which the stream meanders, from 25 to 50 or 75 ft. wide.
Stopped for lunch at 11:45 where the creek nearly reaches the top of the lower cap rock and affords a way out of the canyon on the north side. We could get out almost anywhere on the south side. Started on at 12:30.
Sometime back, perhaps 4 miles above camp, we found obsidian fragments in the tufa. Numerous obsidian fragments in the creek bed and all along the cliffs have probably weathered from the cliffs. The fragments in the tufa and in the creek bed have no sharp or angular edges.
We went out on the north side. On way back , coming down the north mesa, we crossed two very deep narrow canyons, which were very difficult to cross on account of vertical walls on both sides, thus: ((drawing in field book))
Crosses or headed several smaller one and finally turned down one which
