109 



PAGE. 



Summit of the Dogtooth range, looking east from a peak near 

 head of Quartz creek. Slopes underlain by the Ross forma- 

 tion as typically developed in the Purcell mountains 139 



Summit of Mt. Tupper from Tupper Crest, showing characteristic 

 habit of the Sir Donald quartzite. Photograph by Howard 

 Palmer 140 



Characteristic outcrop of Triassic (Nicola) basalts near Ducks 

 station. The terrace is composed of the white Thompson 

 River silts 146 



Looking south from Mt. Tupper to Mt. MacDonald and Mt. Sir 

 Donald (background), showing part of the summit sync line 

 of the Selkirks as shown in the Sir Donald quartzite forming 

 the great escarpment. Photograph by Howard Palmer.. . . 151 



Drag folds in the Cougar quartzite near head of Cougar creek, 



Selkirk range. Cliff shown is about 15 m. in height 152 



Looking north over the South Thompson river, from Campbell's 

 ranch, 9 km. west of Ducks station. The creek bed in the 

 middle of the view is located on the plane of unconformity 

 between Pennsylvanian limestone (left, light-coloured 

 outcrops) and Triassic conglomerate and basalt (right, 

 dark-coloured outcrops) 155 



Contact of the Pre-Cambrian shales (Hector) and the Lower 

 Cambrian quartzites. Exposed in Bath creek, west of 

 Laggan 173 



Mt. Temple showing complete Lower and Middle Cambrian 

 section, capped by Upper Cambrian and underlain by Pre- 

 Cambrian shales (covered by talus) 175 



Castle Mountain, showing Cathedral limestone in the lower 



cliffs; Stephen formation in the talus covered slope; and the 

 Eldon formation in the upper cliffs. (All Middle Cambrian) 176 



Fossil bed in " Burgess shale " on Mt. Field, showing character 

 of the shale, method of quarrying for fossils, and tempor- 

 ary camp of C. D. Walcott 177 



The Mitre and Death Trap (pass) to the right. The cliffs on the 

 right are of Middle Cambrian limestone in Mt. Lefroy. 

 A typical bergschrund is shown around this portion of the 

 Lefroy glacier 178 



Cambrian-Ordovician contact in Mt. Goodsir. The grey rock 

 is the Ottertail limestone, overlain by the dark -coloured 

 Goodsir shales 180 



A typical view of the Upper Banff shale, exposed in Spray valley 



at Banff 184 



Ottertail escarpment showing Chancellor formation forming 

 talus covered undulating surface; Ottertail limestone in 

 cliffs; and the Goodsir shales on gradual slopes 199 



Mt. Tupper from Rogers pass. Slopes underlain by Sir Donald 



quartzite 208 



Illecillewaet glacier in August, 1911. Photograph by H. Ries. . 210 



Illecillewaet glacier in August, 1912. Comparison with preceding 

 figure shows recession of the ice-front during the year 

 preceding. Photograph by H. Ries 210 



Mt. Sir Donald from Eagle mountain; Mt. Uto in foreground. 



Photograph by Howard Palmer 211 



