522 ALLEN DAVID HOLE 
Bear Creek and Bridal Veil Creek. ‘The points observed and the 
measurements made are as follows: 
1. At several points near the Old Smuggler Mill, near Marshall 
Creek. In one area, 60 feet above the mill at an elevation of 
9,300 feet, the rock face forming the side of the valley has a slope 
of about 4o°; the striae dip up the valley (eastward) 15° to 17°. 
In another area, 150 feet to the west, the dip up the valley is from 
3° to 5°. The direction of the striae varies from N. 52° W. to S. 
88° W. 
2. One-fourth of a mile east of Owl Gulch at an elevation of 
9,400 feet (500 feet above the bottom of the valley), sandstone 
forming the side of the valley has a slope of face of 60°; striae dip 
up the valley (eastward) 10°. Direction of striae about N. 87° W. 
3. About one-fourth of a mile east of Owl Gulch at an elevation 
of 9,000 feet, a small reservoir has been constructed with a ledge of 
red sandstone for its bottom. At some places the sandstone 
exposes nearly vertical faces, and on such faces some of the striae 
have a dip up the valley of about 5°. Some of the striae on these 
faces have an equal or greater degree of dip down the valley; but 
there are a greater number of striae exposed which dip up the 
valley than down the valley. Striae here vary in direction from 
S: 63° W. to N. 78° -W: 
Thickness of glacial ice in the San Miguel valley.—In the cirque- 
like head of the San Miguel valley, two miles east of Telluride, the 
ice was probably not less than 1,500 feet in maximum thickness. 
In the neighborhood of Telluride, the maximum was about 1,000 
feet, the thickness gradually decreasing westward to the neighbor- 
hood of Keystone. 
VALLEY OF EDER CREEK 
Ice of the more recent epoch filled the main valley of Eder 
Creek and extended to the edge of the glacier which moved down 
the valley of the San Miguel. The head of the valley is an excellent 
example of a glacial cirque. At the sides and head are long talus 
slopes with precipitous rock walls in places above them; on the 
bottom the talus fragments have been pushed into the successive 
ridges characteristic of rock streams. 
A precipitous rock face at an elevation between 10,500 and 
