430 CHARLES A. STEWART 
material is reworked glacial material similar to that found at 
Priest Lake, and that the southern boundary of this lobe should be 
moved farther south. Mr. T. A. Bonser of Spokane, after a series 
of careful studies, believes that the ice extended at least as far as 
the city of Spokane, and occupied a part of the Spokane River 
valley. Until his results are published, however, we cannot 
definitely locate this southern boundary. 
SUMMARY 
The conclusions reached above are as follows: 
1. The marginal lobe of the Cordilleran glacier occupying the 
Pend d’Oreille valley passed over the divide on the east and filled 
Priest Lake valley. 
2. Salisbury’s opinion is confirmed that if the Kootenai and 
Pend d’Oreille lobes were offshoots from a continuous sheet, their 
connection must have been north of the International Boundary. 
3. The fronts of these two lobes united to form a continuous 
sheet of unknown extent to the south. 
4. Fluviatile reworking of glacial deposits has been so extensive 
along the front of the Cordilleran ice-sheet that great caution must 
be used in marking the limits of glaciation. More careful studies 
will probably show that many localities in the Northwest which 
now show only the bedded bench gravels characteristic of water- 
work were at one time actually covered by the ice, and the line of 
the maximum extent of the Cordilleran glacier will have to be 
drawn farther south than it is at present. 
