62 



obscured by flying storms, and Mr. Gardner was able to right his points, 

 and Mr. Jackson to make his panoramic views in time to return to 

 camp in fair season. One of the photographs in particular shows finely 

 the cross that gives name to the peak. Its cause lies in the cross-seams 

 of the gneiss, which cut one another on that face at nearly a right angle, 

 one of the horizontal ones happening to be broken out to such a depth 

 as allows the snow to lie along in it. 



The mountain itself, like the whole of the range to which it belongs, 

 is of primitive rock, gneiss; the sedimentary beds cap some of its flank- 

 ing hills, and abound over toward the Elk .Mountains, as well as in the 

 valley which lies this side of the Blue River Range, but they do not 

 appear anywhere near the summit. It is not precisely in the main range, 

 but rather constitutes a side branch, or spur striking off to the north- 

 west, and is the most northern spur of the Sawatch Range. Nearly its 

 entire drainage flows into Eagle Kiver, or the Piney, as it is sometimes 

 called, and so into the Grand. The height of the mount is 13,569 feet 

 above tide-water, and that of the left hand peak, in No. 105. from which 

 the view of the cross, No. 106, was made, about 300 feet lower. The 

 perpendicular arm of the cross is 1,600 feet in length and fully 50 feet in 

 breadth, the snow lying in the crevice from 50 to 100 feet in depth. 

 The horizontal arm varies with the seasons in length, but averages 700 

 feet. 



5 x 8. 



Nos. 1-.'!. RENDEZVOUS Camp, on Clear Creek, four miles northwest from 

 Denver, a delightful spot, in the midst of a grove of cotton- 

 woods, with great wide-spreading arms, resembling the east- 

 ern elm. The views are made in early spring, before the 

 trees put forth their leaves. In this cam}) the members of 

 the survey collected to organize and equip for the season's 

 campaign. 



Nos. 4,5. Logo's Peak, from lower end of Este's Park. 



Xo. (5. Long's PEAK, from Prospect Mountain. 



No. 7. Mount Lincoln, from Iloosier Pass, looking across Montgomery 

 Gulch, to the cap-like summit. (See Nos. 79—84, llxl-i, 

 series, page o(>.) 



Nos. 8-12. Panorama from summit of Mount Lincoln. (See 11 z 14 



series.) 



No. 13. HEAD of Montgo.mflv Gulch, as seen from near Iloosier 

 Pass, showing that portion of the range which connects Lin- 

 coln with Quandary, 



No. 14. Head of JUcksklx GULCH. About it are many silver mines 

 that are profitably worked. Buckskin Creek is a small trib- 

 utary of Clear Creek, draining the southern lace of Dross 

 and Lincoln. 



No. 15. The north OB EIGHT hand wall of Buckskin Gulch, and 

 the foot of Mount Bross, Showing, in a well-defined section, 

 the contact of the quartzites with the gneissic rocks below, 

 and the limestones above. 



No. 16. Head of Mosquito Gulch, lying next south to Buckskin, 

 from a high point looking down into the amphitheater, and 

 up to the crest of the divide which separates the waters of 

 Platte and the Arkansas. To the left of the mountain butte, 

 in the center, is Mosquito Pass, a trail only, leading over to 

 Oro Citv and California Gulch. The elevation at the summit 

 of the pass is 12,300 feet. 



No. 17. Head of Sacramento Gulch, lying next south of Mosquito. 



