GEOLOGICAL SURVEY OF THE TERRITORIES. 



103 



Fremont visited these springs in 1843 and took tlie temperature of 

 two of them. I will give liis temperatures and those I took in tabular 

 form, so that they can more easily be compared. llivS upper spring 

 corresponds, I believe from his description, to the Bathing Spring, and 

 the lower spring to the Shoshone. 



Temperatures of Fremont, July, 1843. 



Temperatures, May, 1872. 



A comparison of the above tables would seem to show that in the last 

 twenty-nine years the water of the springs has become cooler. Some of the 

 difference in temperature may, perhaps, be due to the difference in ther- 

 mometers used. A large hotel has been built near the springs for the 

 accommodation of invalids and tourists, and there is no doubt that before 

 long this will be one of the favorite sanitariums of the West. The site 

 of a village has also been laid out, to which the name of Mauitou has 

 been given. Leaving the springs we followed the road up the canon to 

 the Ute Pass. The road through this pass leads to the silver mines of 

 the South Park. It has been cut through solid granites. The caQon 

 is a most romantic one, and the stream rushes down the deep, narrow 

 gorge in a series of cascades and falls. The largest fall, Ute Fall, is 

 GO feet in height. The granite through which the stream has cut its 

 way is a red porphyritic granite, presenting a beautiful appearance, 

 due to the large red crystals of feldspar, {Orihodase.) The mica is 

 somewhat smaller in quantity, and of a black color. The rock would 

 doubtless be capable of a very high polish. As a building-stone I do 

 not think it will have much value, asit readily breaks down on exposure 

 to the weather. 1 noticed at various places on the walls of the caiion 

 stains and discoloration s, due to the iniiltration of mineral waters. 



The junction of the sedimentary rocks with the granites is well shown 

 in the pass. In some places the former are lifted high upon the hills, 

 dipping northeast, at angles varying from 10^ to 30°. The rock imme- 

 diately upon the granites is a hard fine-grained sandstone containing 

 irregular seams of pebbles. Its color varies from a yellowish gray to 

 red. The dip was north 4(P east ; angle, 20°. 



Our next trip was made to Chiauu Caiion, through which Chiann 

 Creek flows to join the Fontaine qui Bouille. In company with Messrs. 



