GLACIATION IN THE TELLURIDE QUADRANGLE 627 
continues to the margin of the glaciated area; on the north side, 
however, a distinct ridge extends for more than half a mile on the 
south side of Turkey Creek parallel to its course; and north of the 
stream, at the margin of the glaciated area, a low ridge lies across 
the valley of the small tributary heading northwest of Bald Moun- 
tain. To the southwest, the uneven moraine topography joins the 
scarcely less uneven landslide topography. 
Fic. 11.—Detail of rock stream in Turkey basin. Elevation 11,300 feet. Look- 
ing east across north end of the moraine-like surface. 
_ The maximum thickness of the ice in these two basins probably 
did not exceed 300 to 4o0 feet. 
VALLEY OF BIG BEAR CREEK 
Glaciers from the cirques north and west of Wilson Peak, 
respectively, united and extended down the valley of Big Bear 
Creek to about 9,300 feet in elevation. The valley of the cirque 
heading west of Wilson Peak lies, in part, outside of the Telluride 
quadrangle; its bottom is broad and less even than is the case in 
