CHAPTER X. 
THE STRUCTURE AND DRAINAGE SYSTEM OF THE KAIBAB. 
Tlie principal displacements and general form of the plateau. — The West Kaibab fault. — The East 
Kaibah monocline. — Relations of these displacements to each other and their continuations south 
of the river. — The summit strata of the plateau. — Age of the uplifting of the mass. — The rela- 
tions of the Colorado River to the plateau as hearing upon the question of age. — Ancient river 
channels. — House Rock Valley. — The moist climate of the Miocene and arid climate of the 
Pliocene. — Lower aititudes in former periods. — He Motte Park and its significance. — Ancient river 
channel on the summit. — The ravines of the Kaibab. — Their conformity to the structural sloj)es. — 
Exceptional character of the Park drainage. — The origin of the ravines conjectured to have been 
in the glacial period, which was rainy here without ice. — Considerations upon the amphitheaters 
excavated in the East Kaibab monocline. — The inferences drawn from them as to the age of the 
plateau. 
The Kaibah is a platform uplifted between two displacements. Upon 
its eastern side is a great monocline where the Carboniferous strata as we 
come from the east suddenly flex upwards and then flex back to horizon- 
tality upon its summit. Crossing the platform from east to west, and reach- 
ing its western mai-gin, we perceive the same strata dropping suddenly by a 
great fault, and their continuation towards the west forms the Kanab Plateau 
The displacement upon the eastern flank is the East Kaibab monocline ; the 
one upon the western flank is the West Kaibab fault. Towards the north 
the two slowly converge and at last meet at a very acute angle in the 
vicinity of the little village of Paria and at the base of the Vermilion Cliffs. 
The Kaibab platform between them, therefore, terminates in a cusp. Since 
the two dislocations throw in opposite directions, the result of their union is 
a single flexure having an amount of displacement equal to the difference of 
the two at the point of junction ; and this flexure continues northward through 
the terraces on the eastern side of the Paria Amphitheater and extends into 
the High Plateaus 
The courses of these two displacements southward from Paria village 
are not straight lines, but curves convex towards the west. Their relations 
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