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N'I (;REEN RIVER, UrAII, TO IIITE, UTAII pI view from the rim as among the most spectacular on the Colorado Plateau. To the southwest is the "Rock Forest" or the "Land of Standing Rocks," a maze of pinnacles, towers, mesas, and canyons (Beaman photograph 747). The distant view to the southeast shows the spires, pinnacles, and lins of the Needles. All of these strangely eroded features are formed in the red and hulrsandstone of the Cedar Mesa Sandstone Member of the Cutler Formation. The oldest rocks exposed in dills along the Green River here are part of the Hermosa Formation, overlain by slopes and ledges of the Rico Formation. Basal beds of Cutler li)rm the canyon rims in the lower reaches of the Green. Spanish Bottom, just below the confluence of the Green and Colorado rivers, is the logical place to camp and rest bdi)re running the thundering rapids of Cataract Canyon. Below the confluence, the Colorado /lows along the axis of the Meander Anticline, a major structural feature. Rocks of the Hermosa and Rico Formations arc highly fractured along this fold. Above Spanish Bottom, the skyline is made ragged by irregular pinnacles carved from the Cedar Mesa Sandstone Member. We could see these pinnacles Irom various points on the river. Rapids in Cataract Canyon are more impressive than most encountered upstream, After getting through about twenty fair-sized rapids in Cataract, we reached "The Big Drop," about half a mile below Calf Canyon, \Vithout question, it is the most notorious rapid in this part of the canyon, The crew of one of our two boats was thrown out when the boat plunged into a large hole at the base of the drop. The boat did not overturn, but the motion was so abrupt that no one remained aboard. Gypsum Canyon, coming in from the cast I~lrther downstream, was explored liJl' liltH miles or more by the Powell party, Our photographs at camera stations 754 and B21, about three-and-a-half miles up Gypsum Canyon, record the cfrects of massive rock falls from the canyon walls, Gypsum and gray shale of the Paradox Member of the Hermosa Formation arc exposed from the vicinity of Calf Canyon Rapids (Beaman photograph 7'l9) on downstream to below GypsulJI Callyon. \Valls of Cataract Canyon tower nearly two thousand feet above the river in the vicinity of Beaman camera station 758. Mille Crags, onl'vl ille Crag Bend, are striking li,'atures that li>rlll ajagged skyline of sandstone crags cut from the Cedar l'vlesa Sandstone Member of the Cutler. Beaman photograph 7G,1 shows the crags Irom the opposite shore of the river. This station is now /looded by the waters of Lake Powell. The fi:mrth segment of our trip ended just uplake Irom Ilite Marina, On the opposite shore arc well-preserved prehistoric Indian ruins, described in thcjournals of the Powell expedition. On a sandstone lil<:c nearby, an inscription was made by a member of the Powell party oll.June 27, IB72. (This locality was revisited at that time by some of the Powell expedition members when, after completing the river trip, they traveled overland from Kanab to retrieve the CailOllita, which had been cached at the mouth of the Dirty Devil River nearby.) I)' 'f A 's. It ;an 1,13