TOPOGRAPHIC FEATURES 735 



limestones" (§23). With the rocks as abundantly fossiliferons as they 

 are, it is to be hoped that some monntain-climber who reaches the top 

 will slip a small chunk of the rock in his pocket before beginning the 

 descent. 



TAH MOUNTAIN (§ 20) 



Tah Mountain was proposed by Walcott for the peak occupied by 

 Wheeler as Moose Pass Station (see his map of 1912). Walcott uses 

 the name for the "Tah" formation, but Tah Mountain has not received 

 the approval of the Geographic Board, and the published description of 

 the formation has been so confused (§§ oOa-d, 326-e) that we have given 

 to it the name of Mural limestone formation (§ 32^). 



TAT EI CLIFFS (§21) 



Tatei cliffs (revised by the Geographic Board of Canada from "Tatay" 

 of Walcott) is a name applied to the uppermost of three cliffs southwest 

 of Coleman Brook and above and to the southwest of Chetang cliff for 

 the purpose of obtaining a formation name which has been retained. 



TITKANA PEAK (§22) 



Titkana peak (9,320 feet) was first called Ptarmigan Peak by Cole- 

 man, who thus duplicated the name of a mountain north of Lake Louise, 

 on the Canadian Pacific Railway. The name Ptarmigan was also given 

 to the pass between the moimtain of that name and Lynx Mountain. 

 Wheeler-^ calls attention to the duplication and suggests Snowbird Moun- 

 tain and Pass, but on his map he applies the term Snowbird to the pass 

 only. Walcott accepts Snowbird for the pass, but proposes a new name, 

 Titkana, for the peak, and the latter has been accepted by the Geographic 

 Board of Canada. 



The section exposed in the mountain corresponds with Walcott's gen- 

 eral description, so far as the Titkana limestones are concerned, the only 

 changes made in the present paper being in the total thickness and in the 

 discovery of niany abundantly fossiliferons horizons. The underlying 

 limestones in the cliffs above Lake Adolphus, which Walcott refers to 

 the "Mumm," are, however, to be referred to the Tatei instead (§§ 26 

 and 28). 



23 Canadian Alpine Journ., vol. 4, 1912, p. 37. 



