DISPLACEMENTS OF THE KAIBAB. 
185 
is preserved for a distance of about thirty miles further south, and then it 
reverts to its simple and single form. Thence onward the fold gradually 
smooths out, becoming less inclined but much wider. The amount of dis- 
placement, however-, does not at first diminish very rapidly, for though the 
inclination of the strata becomes rapidly less, it also becomes wider; the 
hill is less steep but it is longer. At length as we approach the Colorado 
the displacement dwindles more rapidly, and a few miles south of the river 
it gradually vanishes. But in the meantime a new displacement parallel to 
it has made its appeai-ance further to the west, and this is well worth study- 
ing, for the indications are that it is a reappearance of the West Kaibab 
fault, greatly changed in its course or trend and its displacement reversed. 
Reverting here for a moment to the West Kaibab fault, we find it leaving 
the Paria neighborhood with a sotithwesterly course, gradually changing to 
the south and then southeast. As it nears the Grrand Cation its tlirow 
greatly diminishes, and I believe it vanishes entirely about four miles north 
of the brink. At all events, nothing has been seen of it near the brink. 
But looking across the chasm from the north side a flexure is seen in the 
great wall upon the southern side, truly monoclinal in form, with a displace- 
ment of about 450 feet. It is in the line of continuation of the vanishing 
main branch of the West Kaibab fault and its throw is reversed. Its eastern 
side is dropped, while the proper West Kaibab fault drops its western side. 
This reversal of throw is a feature not uncommon in the long faults of the 
High Plateaus as we follow them in their immense longitudinal extensions. 
Thus, by a very curious, though perfectly intelligible process, the displace- 
ment which constitutes the western side of the plateau has gotten upon the 
eastern side. South of the chasm it continues with a southeasterly course, 
becoming a true fault and increasing in the amount of shearing for nearly 
twenty miles. Its further extension and method of resolution is not at 
present known. 
All of the displacements of the Kaibab thus far observed are of very 
simple character, being true faults or monoclines with compai-atively little 
complication or subordinate fracture at the fault planes. We may note, 
however, in the West Kaibab fault and in the parallel step faults into which 
it divides, that feature which is so frequently observed in many of the great 
