U. S. GEOLOGICAL SURVEY 



BULLETIN 707 PLATE LXXVI 



-4. CANYON BETWEEN DELTA AND GRAND JUNCTION. 



General view looking upstream. The rocks dip to the left, away from the Uncompahgre 

 Plateau or arch. The shaily rocks in the top of the canyon walls are of maroon color, 

 and the massive sandstone at the base is brick-red. Photograph by Willis T. Lee. 



B. BRILLIANTLY COLORED SPUR OF THE CANYON WALL. 



One of the projecting spurs of the canyon wall near Bridgeport consisting of alternating 

 bands of maroon and green with here and there bands of yellow sandstone. The valley 

 bottom supports a fairly good growth of sage but when water is put on it grows almost 

 any kind of crop. Photograph by %\ illis T. Lee. 



C. CROSS-BEDDED SANDSTONE. 



The sandstone was once a sand bank in water; the currents coming from the right 

 washed layer after layer of the sand over the crest of the bank and down on its sloping 

 front, making the cross-bedded layers. Photograph by J. K. Killers. 



