1871 SEEIES. 

 (8x10.) 



From Ogden, Ut;ih, via Fort Hull, Idaho, to Fort Ellis, Mont, 



then up the Yellowstone River to the lake, to the Geyser Basins on the 



head-waters of the Madison. The return route includes views along the 



Beaver Head River and that portion of Idaho and Wyoming lying 



between Fort Hull and Evanston, on the Union Pacific Railroad. 

 The numbers are continued from the previous series : 



No. 105. RENDEZVOUS Camp, at Fort 1). A. Russell, near Cheyenne. 

 (See 47.) 



No. 100, 167. First camp of the survey at Ogden, Utah, close under 

 the Wasatch Mountains. A marked feature in the mountain, 

 included in our view, is an exposure of one thousand feet 

 or so of qnartzites and limestone, bent up into an arch, the 

 rocky sides of the mountain being so denuded as to show the 

 stratification very distinctly. Elevation of camp plateau 

 4,5L>7 feet. 



No. 168. Ogden Canon, three miles above its mouth. A narrow gorge, 

 cut through the rocks, with walls 1,500 to 2,000 feet in height, 

 the roadway being built up from the bed of the creek. In the 

 center of the view, a cone-like mass of qnartzites, most dis- 

 tinctly and beautifully Stratified, stands up at an angle of 55 

 degrees and 100 feet high. A very interesting geological 

 pictnre. 



Nos. 169, 170. Camp ne\e the head of Cache Yalley, Utah, look- 

 ing south, seventy-five miles north of Ogden. The valley is 

 about sixty miles in length and seven in width. Is well set- 

 tled with six or eight .Mormon villages, and a total population 

 of some 10,000. Elevation, 4,624 feet 



No. 171. Bear River Crossing, head of Cache Valley, eighty miles 

 from Ogden. 



No. 172. Camp on Gooseberry Creek, north slope of Red Rock Pass, 

 with a view of one of the mountain ridges that separate 

 Cache from Malade Valley. Elevation, 4.706 feet. 



No. 173. Bed Bocb Pass, Idaho. Elevation, 5,041 feet, one hundred 

 miles from Ogden ; the divide between the waters of the Co- 

 lumbia and Salt Lake. The butte on the left is a bright red, 

 ferruginous sandstone, and the other a bluish limestone. 



No. 174. Red Rock BUTTE, one mile below the pass, 300 feet in height, 

 of carboniferous limestone, a rich red color, due to the pres- 

 ence of oxide of iron. 



No. 175, 170. PORTNEUF Canon. Illustrating the immense basaltic 

 overflow, filling the valley as level as a floor, contrasting 

 finely with the bold mountain outlines upon either side. The 

 creek cuts closely up to the beds, exposing an upright wall 

 of columnar basalt for a number of miles. 



No. 1 77. Fort Hale, Idaho, north from Ogden one hundred and sev- 

 enty six miles. Elevation, 4,724 feet. Located in a beautiful 

 grassy valley, among the foot-hills, on the south side of Snake 

 Biver. It is forty miles above the site of old Fort Hall, that 

 was located on the banks of the river. 



