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HUNTINGTON AND GOLDTHWAIT: THE HURRICANE FAULT. 217 
frequent cross-bedding indicate that the water in which the strata were 
deposited was moving rapidly in flowing streams or shallow lakes ; fossil 
trees and the bones of terrestrial animals show that land cannot have 
been far away. Many things suggest that this was a period when the 
country was elevated above the sea and supported abundant life, both 
animal and vegetable. 
B. During the upper half of the Le Roux there was a return to con- 
ditions of even, probably marine, deposition, which continued to prevail 
during the following Painted Desert period. 
C. The next periods, the Kanab and Colob, are unique because of the 
great unevenness with which the strata are bedded and the remarkable 
uniformity of the sand which composes them. This seems to have been 
a time when no life flourished. Possibly the deposits are terrestrial and 
are the product of wind action in a great desert. 
3. At the end of the Jurassic and beginning of the Cretaceous a 
marine phase of even deposition again prevailed for the last time, but 
after the Cretaceous was fairly under way it passed into the alternating 
estuarine and swampy conditions under which the coal measures were 
deposited. 
4, Lastly, came the Tertiary with its conditions of uneven terrestrial 
deposition, which have continued down to the present. 
In regard to climate the formations, so far as land indications are 
concerned, suggest that from Carboniferous onward there was an increase 
in aridity culminating in the arid conditions which produced the Colob 
desert. Then the climate grew more moist and equable, so that many 
plants and animals flourished during the Cretaceous and Tertiary periods. 
Changes of all kinds took place slowly and on a large scale. 
The First Uplift. 
The various writers on the Plateau province agree that the long period 
of quiet deposition extending from Devonian to Eocene times gave place 
at the end of the latter to an era of exactly the opposite character, marked 
by great earth movements, extensive vulcanism, and prolonged erosion. 
The phenomena of the Toquerville district agree perfectly with this, and 
add some details which have not before been placed on record. 
Vuucanism. At the end of the Eocene or early in the Miocene, when 
as yet erosion had made no noticeable impression upon the strata of our 
area, and perhaps even while they were still under water, volcanic erup- 
tions began to occur. In the very southwest corner of Utah a great 
