FEALE.] 



DESCRIPTIVE GEOLOGY — SODA SPRINGS, &C. 



595 



Xame of spring. 



Observations in 1877. 



Observations in 1871 by 

 United States Geo- 

 logical Survey. 



Observations in 1843 1 

 by Fremont. 



O Pi 



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Is 



11 



it- 



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u 



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21 



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 Ilf ■: 



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H 



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 p) bD 



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 n 



pi 

 H-.fi 



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10 



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a 



Bluff Springs So. 1 



No. 2- 



o 

 78 

 78 



o 



*85 



85 



2.30p.m 

 2.30p.m. 







58 



764 



77J 



774 



714 



71* 



o 





o 



o 



































































53 



78 



5p.m... 



53 























Ifud Springs, near Hooper 

 Spring. 









62J 





































61J 

































, 52 



82 



2p.m... 



58 















I 









Small springs near Pavilion 









53 

 544 

 55 

 554 



































































534 







































' 684 































■ In the sun. 



The thermometers used in 1871 were ordinary thermometers, while 

 those used in 1877 were made especially for taking the temperatures of 

 springs. The table just given shows that very few of the springs can be 

 classed as thermal, few if any, except the Steamboat spring, exceeding 

 the temperature of the air. Observations should be made in the winter, 

 however, to determine whether the temperatures exceed the mean an- 

 nual temperature. Some of the springs exposed to the direct rays of 

 the sun are evidently raised in temperature. 



One cannot help being reminded as he wanders among the extinct 

 spring-basins that they are dying out, and long ago must have been 

 wonderful hi their dimensions and phenomena. As Dr. Hayden has 

 said, "At this time they may be called simply remnants of former 

 greatness." 



The formation of the cones is similar to what is seen in the cones of 

 hot springs, viz, the overlapping of successive layers. It is, therefore, 

 exceedingly probable that these springs were once all boiling or at least 

 hot springs. 



A few miles east of the village of Soda Springs at the mouth of a 

 small caiion there is a collection of sulphur springs and a pool or lake, 

 the surface of which is agitated by the escape of carbonic acid gas and 

 sulphuretted hydrogen, which fills the surrounding atmosphere. The 



