GLACIATION IN THE TELLURIDE QUADRANGLE FLT 
including Potosi rhyolite, which is unknown in the more recent drift 
except in small fragments; and (3) the generally more weathered 
appearance of the surface, especially as compared with that of the 
more recent drift in the valley of Eder Creek below. 
The ridge west of Eder Creek above the limit of the ice in the 
San Miguel valley, and up-to about 10,000 feet, contains on the 
surface fragments of rock in variety including blocks of Potosi 
rhyolite up to 18 feet in diameter. At several places holes a foot or 
two in depth expose rounded, as well as angular, bowlders in variety. 
No cases of undoubted striation were observed. In the forest- 
covered portion, but few bowlders or rock fragments could be seen; 
on slopes free from trees numerous small fragments, including 
rhyolite, occur. 
On the east, the area marked by rhyolite bowlders and fragments 
joins the deposits made by the glacier of the more recent epoch; on 
the west, it extends almost to the bottom of the next small valley, 
about a half-mile distant. 
IN THE VALLEY OF REMINE CREEK 
The valley of Remine Creek is irregularly fan shaped, with low, 
round-topped ridges radiating from the lower part of the valley 
above Keystone, until they are lost in the nearly even steep slope 
which stretches from timber line up to the very crest of Iron © 
Mountain. Neither on the face of the mountain to the north, nor 
in the valleys below is there evidence of glaciation of the more 
recent epoch. Exposures of drift, with a few striated bowlders, are 
found at the two points indicated on the map, viz.: (1) on the 
eastern side at elevation 9,700 to 9,900 feet, and (2) on the western 
side at 9,400 to 9,700 feet. At both of these points, the exposure 
is due chiefly to the slipping of the surface layers on a steep slope 
of a hill 50 to 100 feet high; bowlders in variety up to 4 or 5 feet 
in diameter occur, mostly well rounded, but rarely distinctly 
striated. Large Potosi rhyolite bowlders do not occur here as in 
the areas near Eder Creek. 
These two drift areas in the valley of Remine Creek are referred 
to the earlier epoch of glaciation because of their isolated position; 
that is, the absence of evidence of glaciation in other parts of the 
