420 



GEOLOGICAL SURVEY OF THE TERRITORIES. 



prism-shaped summit, very similar to that of Capitol Mountain. Its 

 elevation is 12,891 feet. There are several summits near it, both in 

 position and elevation. 



The next peak of importance in this range is station 32. This moun- 

 tain stands slightly detached from the range, extending into and partly 

 across the valley of Anthracite Creek, which takes a wide detour to 

 get around it. It is composed of brownish-red, highly metamorphosed 

 slates. There are three summits, of which the central one is the highest. 



Farther down toward the south the range is very much diversified, 

 now high, now low, but nowhere lower than 11,000 feet. It ends west 

 of Crested Butte, in an isolated group of mountains, of an elevation of 

 about 12,500 feet. South of this group there are two bits of sloping 

 mesa, and then the valley of the Gunnison. 



West of this range the mountains decrease in elevation, and occur in 

 isolated groups. Between Anthracite and Coal Creeks there is a short 

 range, consisting of two ridges, connected by a low saddle, of about 

 10,000 feet in elevation. These ridges contain several summits, ranging 

 in height from 12,000 to 12,600 feet. In the angle of Anthracite Creek, 

 and connected with the northern end of the range mentioned above, is 

 a solitary peak, known to the prospectors as Mount Marcellina. Upon 

 its precipitous southern face are, in bas-relief, Gothic spires, precisely 

 as on the eastern face of Gothic Mountain. 



Joining this range near the saddle, in the middle of its length, is 

 quite a heavy group of mountains. It sweeps quite around the head 

 of Ohio Creek, and contains many high peaks, several reaching nearly 

 13,000 feet. This group, in turn, is joined, by a low saddle, to a group 

 which heads Coal Creek, of which 8-34 is the highest summit.. 



From station 34 to stations 38 and 39 runs a well-defined ridge, hav- 

 ing an east and west direction. It connects with the last-mentioned 

 group by a very low ridge, not exceeding 9,400 feet. This ridge ends 

 the system, and with it the Bocky Mountains in this latitude. West- 

 ward, to the Wahsatch range in Utah, stretches a system of enormous 

 plateaus, in which are cut the canons of the Grand, Green, and Colo- 

 rado Bivers. 



Bisiug on the north from the valley of the Gunnison Biver and its 

 North Fork, was originally a great plateau. Its limits were, on the 

 west, about in longitude 108° 15'; on the south in latitude 38° 45'. It 

 extended east nearly or quite to the Elk Mountains, and north to the 

 Grand Biver. Its elevation, in its eastern part, is about 11,200 feet, 

 an elevation still held by a few isolated points of trachyte. The ele- 

 vations of a few points on its surface will give an idea of the direction 

 and amount of its slope. 





Latitude. 



Longitude. 



Elevation. 





o / 

 39 3 

 39 2 

 39 1 

 39 

 39 5 

 39 23 

 39 22 

 39 23 

 39 23 

 39 4 

 39 6 

 38 53 



o / 

 107 41 

 107 40 

 107 40 

 107 45 

 107 50 

 107 51 

 107 51 

 107 55 

 107 57 



107 56 



108 13 

 108 10 



Feet. 

 11, 128 



Station 43 



11, 134 



8-39 



11, 096 



Station 42 (not the original surface) 



10, 632 





10, 954 



North Mam 



10, 973 





10, 897 



23-45 



10, 823 



24-45 . 



10, 623 



4-39 



10, 900 



North end of plateau, (station 54) 



9,800 



South end of plateau, (station 59) 



9, 733 







