166 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 



TJta.li, for information afforded me. I would also refer to the uniform 

 kindness and courtesy extended to us at the various military posts. 



Hoping this report may meet all requirements, I am, very respectfully, 

 your obedient servant, 



A. C. PEALE. 

 Dr. F. V. Hayden, 



United States Geologist. 



Ogden City, in Utah Territory, is situated at the western base of the 

 Wahsatch Mountains, in the Salt Lake Basin. It is between the Ogden 

 and Weber Eivers, and is the point where the Union Pacific, tlie Cen- 

 tral Pacific, and the Utah Central Railroads effect a junction. The town 

 contains about six thousand inhabitants, and is built partly on the ter- 

 race that skirts the base of the mountains, and partly on the level bot- 

 tom through which the rivers flow. Its streets are all wide and lined 

 with beautiful trees, while on each side flows a clear stream of fresh 

 spring-water. 



The Wahsatch Eange e:^tends north and south, its gray peaks being 

 snow-crowned the greater part of the year. Our first camp after leav- 

 ing Cheyenne, Wyoming Territory, was on one of the terraces, about a 

 mile from the foot of the mountains, which are cut into sections by 

 numerous caiaons. They interse(jt the range at right angles to the trend. 

 One of them, Ogden Canon, I visited as typical of the others. The ' 

 rocks at the mouth of the caiion I found to be syenites of a red color, 

 and having a specific gravity of 2.6. The feldspar in it was a flesh-col- 

 ored orthoclase alone. The only veins noticeable were some illy defined 

 of quartz and feldspar. These syenites must in places pass into granites, 

 for a specimen brought me I found to be a protogine containing a green 

 talc, which, with the flesh-colored feldspar and white quartz, formed a 

 beautiful specimen. The rock, however, could not be located. In this 

 syenite, at the distance of probably half a mile to the south of Ogden 

 Canon, some prospecters have claimed to have discovered tin ore. In 

 the specimens brought me I failed to discover even a trace of tin. Upon 

 the syenites very thick beds of quartzites lie. They are mostly of a 

 white color. In some places, however, they are dark-brown, and highly 

 ferruginous. The specific gravity of these quartzites varies from 2.5 to 

 2.6. They extend for some distance and dip at an angle of about 80°. 

 I found, also, a metamorphic conglomerate, composed of beautiful red 

 and pink , siliceous pebbles imbedded in a light-gray siliceous matrix. 

 The quartzites are succeeded by quartz schists, which in turn pass irtto 

 a dark cherty or siliceous limestone. This limestone produces an excel- 

 lent quality of lime, which has been used by the Union Pacific Railroad 

 Company in building their engine-houses. There are in the caiion three 

 lime-kilns in active operation. 



Farther up the caiion than I was able to go, I was told there was a 

 ledge of silver ore that promises to pay well. A piece of ore that was 

 handed me, and alleged to be from the same, yielded, on examination, 

 both silver and copper. I was also given a piece of coal said to be 

 from some distance up the canon. 



We left Ogden on the morning of June 10, and took up our line of 

 march, traveling in a northwesterly direction along the base of the 

 mountains, around Bear River Bay, and in the afternoon ^amped in a 

 beautiful, small, green valley, having gone ten miles. Isicar our camp 

 were situated some hot springs, very noticeable from the abundant, 



