460 J. W. Powell—Geological Structure of the country 
mountain climbing. Several small towns have been located’ 
along its foot, and the people have given to the cliffs lying to the 
south of the Rio Virgen, the name Hurricane Lodge, but in 
order to conform this to my general nomenclature, I have called 
it Hurricane Cliff. The line of cliffs north of the Rio Virgen we 
esignate as Toker Cliffs; the displacement we call Hurricane 
ault. 
It will be observed that the direction of these faults is, in a 
general way, at right angles to the grand strike of the forma- 
tions, and as the drop is to the west of the fracture, the local 
dip is easterly. 
Going yet farther to the east about twenty miles, another 
fracture is discovered. This has been seen to extend south of 
the cafion twenty-five or thirty miles; how much farther it 
may continue is not known. It has been traced to the north 
through the Vermilion Cliffs, where Short Creek Cafion marks 
its position. Where it crosses the Shinarump Cliffs, the dis- 
placement is seen to be about 120 feet. On the north side of 
the Grand Cajion it is marked by a cafion valley about thirty 
miles long, to which we have given the Indian name, To-ro- 
weap. At the foot of the valley, on the brink of the Grand 
Cajion, the displacement was found to be 820 feet, and it ap- 
= to be still greater on the south side. We have named this 
o-r6-weap Fault, and to the clifts have given the same name. 
Again to the east another fault is discovered. We are not yet 
certain whether this extends to the south of the Grand Cafion 
or not; the most southern point where it has been seen is about 
ten miles north of the cafion, from which point it has been 
traced past Pipe Spring to the foot of Long Valley, thence up 
Long Valley to its head, and from thence across the divide to 
these eruptive ranges, the eastern wall of the valley of the 
