



GEOLOGICAL 



illation south and east, 

 room to doubt the Tria 

 Jurassic. 



Colonel Fremont, 

 miles south of Uintah 



and the 



in his r< 

 River. 



>f these beds, 

 sport of 1844, 



is that rock-salt is found some 

 rtin (lunnisons and Dr. Sehiel's reports, red 

 strata, with salt and gypsum, are mentioned from tl.e neighborhood of his trail over 

 the Wahsatch Mountains. In the report of Brevet Lieutenant Colonel Efoggies, it is 

 stated that a stratum of rock-salt has been found in 'the mountains bordering San Pete 

 Valley on the east, some 20 miles south of Manti, and that it is also represented to 

 have been found in the mountains forming what is known as San Pete Canon, about 

 50 miles from the first locality, imbedded 'in reddish marlv elay. Some specimens of 

 it were secured for our collection by the kindness of Ueneral A. S. Johnston and ( ol- 

 onel Crosman, Quartermaster-General's Department, United States Army. 



From a report of Assistant Surgeon Dr. Charles Brewer, Inked States Army, of 

 a march from Camp Floyd to the Virgin River in 1859, we learn that beds of gypsum 

 are found near the mouth of Salt Creek Canon, not far from the town of Nephi, and 

 that red sandstones and shales were noticed at numerous points of the route. 



generally, and with much good reason, although without unquestionable proof, re- 

 ferred to the Triassic era, is largely developed in the region of the Wahsatch range, 

 south of our route. 



west of it, where cultivation would prove successful. A heavy growth of sage gen- 

 erally indicates a fertile soil, deficient in humidity, and by irrigation this want can be 

 supplied. The lower portion of the Green River Valley, near Brown's Hole, com- 

 pares in altitude with the Salt Lake region, and the climate of the two does not appear 

 to differ much. 



Higher up, toward the Wahsatch Mo 

 that of Black's Fork, near Fort Bridger, 

 some years ago, the head branches of H« 

 above the ocean, being about 6,500 feet, is 

 cold. The growing season is very short, 



ins, we find more 1 



fertile valleys, like 



Supply, where Mo 



rmons had "settled 



s Fork, and others, 



but their altitude 



great, and their clii 



nate, therefore, too 



the crops are frequ 



entlv damaged by 



-Rock, Hi 



ne, materi 



al for brick 



and i 



idobes.an 



d also timb< 



*r, ar 



is district. 



or can 1 



>e procured 



at a i 



uoderate 



cost. Woo 



a. to 



he rafted 



down Ore 



en River. 











