GLACIATION IN THE TELLURIDE QUADRANGLE Gla 
NORTH SIDE OF STREAM HEADING WEST OF GRIZZLY PEAK 
On the north side of the stream, outside the limit of glaciation of 
the more recent epoch, and extending down the valley to elevation 
about 10,600 feet, rounded and subangular bowlders are mingled, 
with shale fragments, including Telluride up to 8 feet in diameter, 
monzonite, and other forms of igneous rock. This area is classed 
as older drift chiefly because of the striking difference in topography, 
as compared with the newer drift above 10,700 feet elevation. At 
the limit of the more recent drift as mapped, the surface of the 
moraine near the stream is 150 feet above the bottom of the valley 
with a westward-facing slope of 30° to 35°. In the older drift area 
outside, the hillocks are low, with flattened crests and gentle slopes. 
On the south side of the stream in the area of more recent drift, 
moraines also occur; on the south side of the stream opposite the 
older drift area, as mapped, are precipitous faces of outcropping 
rock or slopes of talus. 
AREAS BETWEEN SHEEP MOUNTAIN AND EAST DOLORES RIVER 
The area west of Sheep Mountain is for the most part heavily 
wooded, and the surface deposits are much obscured. At two 
places, however, glacial deposits were found. One area is at about 
10,400 feet elevation, half a mile south of the limit of glaciation, as 
mapped, for the more recent epoch. It consists of a short ridge 
extending in a northeast-southwest direction, with some irregular 
topography including kettles on the west, and a nearly level area to 
the east joining the steeper slope above. An exposure on the 
western side of the ridge shows the usual composition for moraines. 
The other area includes deposits found near the stream which heads 
west of Sheep Mountain. From elevation about 10,400 feet up to 
11,600 feet, drift occurs nearly continuously near the stream. For 
about a quarter of a mile above 10,500 feet elevation on the right 
side of the stream is a distinct ridge with top 30 to 4o feet above 
the bottom of the valley; this ridge consists of typical glacial 
débris, including striated bowlders. On the left side of the stream 
opposite this moraine, and on both sides up to 11,600 feet, the 
glacial deposit is often merely a surface covering, showing no dis- 
tinctive topography characteristic of glacial deposits. Striated 
bowlders were found at 11,600 feet on the left side of the stream. 
