."<» C. D. WALCOTT — A DISPLACEMENT IN THE GRAND CANON. 



The displacement lias long been known as the East Kaihab fold of Po\vell. ;;: 

 Captain Dutton describes it as the longest line of displacement known to 

 him: " Its total length, reckoning as one displacement the Wasatch, Grass 

 Valley, Table Cliff, ami Eastern Kaibab portions, cannot fall much short -of 



300 miles, and may considerably exceed that after the termini have been 

 discovered. It presents many phases or modifications, but the dominant 

 feature is the monoclinal form. The maximum displacement is at the 

 Wasatch Plateau, and reaches nearly 7,000 feet."f The Eastern Kaibab 



porti f this gnat displacement will be considered apart from the more 



northern divisions. It extends as a monoclinal fold, with the down curve 

 to the east, from the foot of the Vermilion cliffs, in southern Utah, along the 

 eastern side of the Kaibab plateau to the precipitous northern walls of 

 Nun-ko-wcap valley, in the Grand Canon. Here the fold abruptly changes 

 to a fault that extends to the southeastern walls of the canon, where it again 

 merges into the fold and disappears. 



Butte Fault was the name which I selected and applied in my field notes 

 on account of its connection with the origin and development of the six 

 great buttes in the northeastern portion of the Grand Canon. These buttes 

 rise from 2,000 to 3,000 feet above the Colorado river and extend along its 

 western side, from the narrow canon outlet of Nun-ko-wcap valley to the 

 foot of dinar valley, a l'r\\ miles south of the mouth of the Little Colorado 

 river. Not only the buttes, hut the canon valleys of Nun-ko-weap, Kwa- 

 guut and Chuar, and the visible line of the fault, are situated entirely within 

 the greal ampitheatre enclosed by the canon walls to the southwesl and west 

 of the head of the Grand Canon. 



In order to clearly indicate the stratigraphic position and thickness of the 

 Btrata affected by the east Kaihab fold and the Butte fault, the following 

 table i- inserted : 



, Feet. 



'I', rtiary 816 



8,096 



Jurassic (identified) 960 



Jura-Trias - 8,480 



("Permian 864 ~| 



,, , i pper Aubrey Limestone 806 , ,,.,. 



( arbomferoue , " ^ i . i tu - r l.lui, 



Lower idstone 1,485 ( 



Red Wall Limestone 962 J 



Devonian..... Temple Butte Limestone M 



, • I 'I alcareous and arenaceous shales) 1 , ,.-,. 



( ambnan — < > l ,060 



i sandstone) . / 



( Ihuar shales and limestones | ._____. ■">. 120 



,. .. I Grand Cafion (sandstones, with lava flows in 



,nkian upper part) . . 



Yi-iinu (beaded quartzite and schists) ... 1,0 



26,600 



of the v,. .. i|, High Plateaus of Utah, 1880, < 



