632 ALLEN DAVID HOLE 
contain some rounded projecting points of rock in place with 
abundant talus. 
From about 11,000 to 10,800 feet in elevation a lateral moraine 
more than half a mile long lies about a quarter of a mile west of the 
stream. On the eastern side opposite, there is no distinct ridge of 
drift, but the somewhat steep slope shows glacial débris at many 
places. At 10,900 feet in elevation in the bottom of the valley, a 
small alluvial flat is found, evidently due to the silting-up of a pond. 
Southwest of this flat the side of the valley is in some places too 
steep for débris to lie; in other places it is more level, and irregular 
hillocks inclose kettles. Near the western edge of the glaciated 
area some landsliding has occurred. In the lower part of the 
glaciated area abundant glacial débris. conceals the bed rock at 
most points and extends to a height of 300 feet above the stream; 
bowlders up to 5 or 6 feet in diameter are found, many of them well 
striated. In the lower half-mile of the glaciated tract the topog- 
raphy of the drift is quite irregular, though some ridges subparallel 
to the stream occur, as well as a less number of shorter transverse 
ridges. The lowest point reached by the ice in this valley was at 
an elevation of about 10,150 feet. Maximum thickness of ice, 
about 500 feet. 
VALLEY HEADING SOUTH OF LIZARD HEAD PEAK 
The small cirque lying south of Lizard Head Peak is cut in shale, 
and its upper part has no glacial drift. The more level part of the 
cirque ends at about 11,500 feet in elevation; below this for about 
a quarter of a mile the gradient is steeper and the stream flows for 
a part of the way in a canyon having for its right wall a precipice of 
igneous rock, in places 75 to too feet high, and for its left wall a 
steep talus slope. 
The lower limit of glaciation in this valley was a little below 
10,200 feet in elevation. At this point is a broad transverse ridge 
of drift to feet high, extending from the stream eastward for 100 
yards. Another similar transverse ridge, perhaps 15 feet high, 
occurs 20 rods farther upstream. The slopes of the valley are 
covered with drift up to 200 or 300 feet above the stream; the 
deposit on the west side of the stream is apparently more abundant 
