6o 



Miles and 

 Kilometres. 



391-7 m. Kootenay Landing — Altitude 1,727 ft. 



626-7 km. (524 m.). From here a fine view of the delta 

 to the south can be obtained. This valley 

 separates the Purcell range on the east, from the 

 Selkirk system on the west. 



Kootenay Lake — Kootenay lake occupies the 

 Purcell trench which marks the boundary 

 between the Purcell mountains to the east and 

 the Selkirk system to the west. The lake is 

 about 65 miles (104 km.) long with an average 

 width of about two miles (3 km.). The eleva- 

 tion above sea level is about 1,750 feet (523 m.) 

 and the greatest known depth is 450 feet 

 (137 m). The total area is approximately 

 220 square miles (7,000 hectares). 



The lake is almost straight with a general 

 trend a few degrees west of north. The outlet 

 is through the west arm about 30 miles (48 km.) 

 north of Kootenay Landing. The lake is 

 closely bordered by rugged mountains which 

 slope more or less steeply from the shore and 

 in many cases are fronted with cliffs. The 

 crest lines average over 6,000 feet (1,828 m.) 

 with occasoinal peaks ranging up to 8,000 feet 

 (2,438 m.). 



Sandy and gravelly beaches and deltas are 

 found opposite the mouths of the entering 

 streams; elsewhere the shore is rock-bound. 



The southern 30 miles (48 km.) of the lake 

 is for the most part eroded in the granitic rocks 

 of the Nelson batholith with the exception of a 

 portion of the east shore between Columbia 

 point and Crawford bay which is underlain 

 by sediments of the Selkirk series striking with 

 the trend of the shore line and showing subor- 

 dinate strike ridges. Also on the west shore 

 at Proctor and continuing south for 10 miles 

 (16 km.) the Shuswap series is developed, the 

 beds striking northeast and dipping northwest. 

 At Proctor the Shuswap series outcrops on both 

 sides of the lake. 



