194 



KUometres surrounded by ten gigantic peaks each of which 

 shows the Lower and Middle Cambrian 

 formations. Moraine lake lies in this basin 

 between a large moraine and the Wenchemna 

 glacier. Mt. Temple (11,626 feet), (3,543-6 

 m.), the highest in this part of the Rocky 

 mountains, stands between these two valleys. 

 The talus slope shown in the illustration on page 

 175 shows the position of the contact between 

 the Pre-Cambrian and the Cambrian. The 

 Middle Cambrian begins at the change in slope 

 in the cliffs on the left, and the peak is capped 

 by Upper Cambrian thin-bedded limestones of 

 the Bosworth formation. 



Leaving Laggan station, a good exposure 

 of Pre-Cambrian slates and shales wiil be 

 visited within 200 yards (183 m.) of the west 

 end of the railway yards. The illustration 

 on page 173 shows the conformable contact 

 between the Pre-Cambrian shales of the Hector 

 formation and the Lower Cambrian quartzites. 

 This contact is exposed in the south end of 

 the ridge separating the Bow valley from the 

 much smaller valley of Bath creek. 

 116 m. One mile west of Laggan the railway leaves 



185-6 km. the Bow river and follows up Bath creek to 

 the summit. Bow river continues toward the 

 northwest, to its source in Bow lakes, 20 miles 

 (32-2 km.) up the valley. The stream is 

 enlarged by water from Hector lake. Mt. 

 Hector (11,125 f eet ) (3,39i m.), with its 

 castellated cliffs of Lower and Middle Cambrian 

 formations, can be seen from the railway to 

 the right of Bow valley. 

 121 -5 m. In a quarry on the right of the railway 

 194-4 km. there is a good exposure of Pre-Cambrian 

 slates, in fresh condition. These shales and 

 slates are transported to Exshaw, where they 

 are used in the manufacture of cement. The 

 purplish and drab color of these rocks is char- 

 acteristic of the formation. 

 122 m. Looking ahead to the right can be seen the 



195-2 km. perpendicular cliffs of Mt. Daly formed in 

 Middle Cambrian limestones, with a typical 



