438 GEOLOGICAL SURVEY OF THE TEERITORIES. 



cracked and shattered, and another winter will probably demolish this 

 natural causeway. 



The eastern edges of the plateau and the main spurs and ridges have 

 a northwest and southeast trend, parallel to the Park range. 



West of the Park range and parallel with it is a broken range, about 

 ten miles distant from the axis of the main one. Starting as a spur 

 from the Mount Powell mass it forms the high ridge of station LXXXI, 

 reaching to 11,000 feet. The Grand has cut a caiion through the ridge, 

 leaving a detached mountain, station LXXX, north of the Grand. 

 North of station LXXX there is quite a low saddle ; then it rises again 

 to station LXXVII. To the north the Yampah has cut a small canon 

 through the range, but it there becomes lower, and soon falls oif to the 

 bYoad, low ridge of station XV. West of this range, and between it 

 and the spurs from the plateau, lies Egeria Park, drained by the Yam- 

 pah, the Chimney Fork, a tributary of the Yampah, and Bayard Creek, 

 a branch of the Grand. It is an open, terraced basin, about twelve 

 miles long from northwest to southeast, and from one to four miles wide. 

 The divide between the Yampah and Grand Eiver waters is only a very 

 low gravel terrace, scarcely noticeable. 



The valley ot the Yamiiah, between stations XVII and XV, forms a 

 small park about ten miles long and from one to three wide. Below 

 the great bend of the Yampah, near station XV, tor seven miles the 

 valley is a wide, open bottom ; it then closes into a caiion for nine miles, 

 and then widens out into another rich and lertile bottom, extending 

 alajost continuously for eighteen miles down the river, and bordered on 

 the north and south by low, rolling hills. It is in this valley that the 

 new settlement of Haydenville is started, the beginning being made in 

 November last. 



Near the lower end of the bottom the wagon road from Eawlings' 

 Springs on the Union Paciiic Railroad to the White River Indian agency 

 crosses the Yampah, and a small Indian trading-post, now kept by Mr. 

 Morgan, is located there. 



The valley of the Yam]>ah is the finest and most promising of the 

 whole district. This river is bordered by a growth of large cotton woods, 

 and the soil appears to be ver;s lertile and i)roductive It has an eleva- 

 tion of from (i,-!00 to 6,800 feet. The only valley that rivals it in the 

 least is that of the White River at Simpson's Park, where the agency 

 is located; this, however,' is on the Ute Indian reservation. Coal is 

 found in a number of localities along the Yampah, between it and the 

 White, as well as north of it, and although it has not been thoroughly 

 explored and tested, yet it promises to be very abundant and of good 

 quality, equal to any in the Territory. The Steamboat Springs are 

 located right at the bend of the Yampah, on both sides of the river, and 

 close to the bank on the north side. The water is lukewarm, of from 

 70° to 72° temperature, and is strongly saturated with sulphur. 



At the head of a small stream, a tributars of the Eagle, draining the 

 valley southwest of station LXXXII, there are a few quite small sul- 

 phur-springs, and on the banks of the Grand River, two miles below the 

 mouth of the Eagle, there is another set of sulphur-springs on both sides 

 of the river. A short distance below these springs there is a very large 

 one that gushes forth close to the edge of the river, so that in the spring, 

 at high stages of the river, it is entirely submerged. This spring has 

 very little, if any, sulphur, though it probably has some salt, with possi- 

 bly some other ingredients. 



North of the White Eiver plateau the country is mountainous and 

 irregular, with no distinct, well-defined system. 



The continuation of the spur, of which 6-XLI is the highest point, 



