Mi'/r GJae'nrReijhui. Alaxh'n. — ( 'iis/iii,(/. 213 
side just to the west of Berg lake valley. These moraines both 
lie on the surface of the ice lying in the main valley. Ice from 
the Girdled glacier seems just to reach this, but does not pass 
into Main valley, nor can-it have done so for some little time. 
Granite canon. — The valley to which Mr. Muir applied this 
name is, barring Main valley, the largest one opening into the 
eastern part of the Muir glacier amphitheatre. It is a rather 
gloom}' looking valley, bordered by low mountains with some- 
what precipitous slopes. These are dotted with patches of snow 
lying in sheltered depressions, l)ut at present give rise to no 
glaciers. Hence the ice lying in Granite canon presents the same 
features as that in Main valley. The ice is inert. It has no 
feeders. It has disappeared from the upper portions of the val- 
ley while yet lying in considerable force in the lower portion. It 
diminishes in altitude toward the head of the canon, the highest 
point in the vicinity, lying nearly three miles south of the en- 
trance. About four miles up the canon the end of a lake is 
visible, lying in a side valley opening into the western side of the 
canon. Though only the end of the lake Avas visible the nature 
of the countr}' surrounding it clearly indicates that the lake Ijears 
the same relation to Granite canon that Berg lake does to Main val- 
ley, viz : that its waters are held in place b}' the ice barrier acnjss the 
front of its valley. The same cause has been at Avork in Vioth 
places. That the ice formerly moved out of Granite canon, and 
did so for a Aast length of time is indubitabl}' shown l)v the 
material of Avhich the great moraine that issues from it is 
composed. The great proportion of this material is diorite which 
is only found in place in the mountains enclosing the up- 
per portions of the valleys that open into the glacier's amphi- 
theatre from the east and north. Ice certainly flowed 
out from Granite canon long enough to carry this moraine clear 
to the present front of Muii- glacier and beyond. The outward 
flow of the ice from Main valle}- must have ceased before the 
stoppage of the flow from Granite canon. The moraine which 
emerges fi'om Granite canon and passes around the front of the 
Girdled glacier proves this. On the cessation of the floAv from 
Main valley the ice must have receded somewhat from the moun- 
tain flanks. The eastern portion of the ice flowing out from 
Granite canon would then have encountered less resistance in this 
direction, and a portion of it would deflect from the main mass 
