DENVER & RIO GRANDE WESTERN ROUTE. 137 
cliffs on the south. The stream cuts into the upraised block of strata 
on the south of this fault, and its south bank is followed by the 
railroad through many cuts in the quartzite and finally in the 
underlying granite. About half a mile beyond milepost 358, at a 
sharp bend of the stream around a narrow point that projects from 
the south, at least 50 feet of granite is exposed, and the massive 
layers of the Leadville limestone lie like plates on the hillside across 
the river. As the Leadville limestone never rests normally on the 
granite it follows that the fault must lie in the river and has caused 
the formation of Noname Park. 
This fault is the last of the series; and, as the train swings around 
the sharp bend toward the tunnel, the traveler may see the beds 
descending rather steeply downstream. Here the stream turns once 
more and cuts back toward the fault in a sharp curve, but the rail- 
road pierces the rocky point, and when the train emerges from the 
inky blackness of the tunnel the traveler finds himself passing 
through the rock formations for the last time. The quartzites dis- 
appear first below the stream, and finally the massive ledges of the 
Leadville limestone; and then the train enters the open valley 
formed by the erosion of the upper Carboniferous rocks and ap- 
proaches Glenwood Springs. 
Here, on the right, is a grove of cottonwood trees, which surround 
the bathing pool of hot sulphur water that has made this a famous 
health and pleasure resort, and one may catch glimpses of the towers 
of the Hotel Colorado, which stands somewhat higher on the moun- 
tain slope and overlooks the lower part of the valley. 
Springs are also abundant in the river and beside the railroad track 
just above the station. Glenwood Springs (see Pl. LX) is at the 
junction of Roaring Fork with Colorado River. 
Glenwood Springs. Roaring Fork flows in a broad valley that it has 
Elevation 5,758 feet. eroded in the soft Carboniferous shale—a valley 
iin cipend so broad that it seems like the principal valley. 
The town is noted for its shade trees and its homes 
and for its accommodations for the travelers who are attracted here 
by the reputation of the springs. An added attraction is the famous 
“ Hanging Lake ” (see Pl. LXI), which lies high up the slopes of the 
canyon of Colorado River, about 12 miles from the town. Glenwood 
Springs might also be called a coal-mining center, for although no coal 
is mined at or near the town it furnishes an outlet for a great coal field 
that lies to the south and west. A branch of the Denver & Rio Grande 
Western Railroad turns to the south at Glenwood Springs and con- 
hects with the coal-mining towns of Sunshine and Spring Gulch. 
Forty miles south of Glenwood ‘Springs and connected with it by 
rail are the famous Yule marble quarries, which are now sending 
their output to all the large cities of the East, A notable example 
