TOPOGRAPHIC FEATURES 733 



have shown (§276), there is duplication, and the beds called "Hitka" 

 are those called Titkana in the mountain of the latter name. 



HOT A CLIFF (§13) 



Hota cliff, on the northeast side of Coleman Brook, is in a position to 

 expose thfe Hota formation if there is no faulting to the southwest; but 

 the exposures are very poor, the contacts with the overlying Chetang and 

 the underlying Mahto are covered, and no fossils are recorded by Walcott. 

 The description of the rocks bears no resemblance to that of the rocks 

 occupying the corresponding stratigraphic position in Mumm Peak, 

 .where the contacts and every foot of the formation are exposed (§ 30^). 



LYNX MOUNTAIN (§14) 



Lynx Mountain : Wheeler, 1912, Canadian Alpine Journal, volume 4, map. 



Phillips Mountain : Walcott, 1913, Smithsonian Miscellaneous Collections, vol- 

 ume 57, number 12,. page 333, plate 57, figure 2, and plate 58, figure 1. 

 (Credited by Walcott with a height of 9,542 feet, which is the height of 

 Lynx Center Station of Wheeler.) 



Lynx Mountain (10,471 feet high) is the topographic feature to which 

 Walcott has applied the name "Phillips" (§ 17), his photographs leaving 

 no doubt as to the mountain meant. The mountain to which he applies 

 the name Lynx is a still unnamed peak, of unknown height, southwest 

 of Lynx Mountain. 



Walcott's description of the Lynx formation states that it forms almost 

 the entire mountain to which he gave that name, but Ave are not certain 

 of its presence in this snow-and-ice-covered peak. The Lynx formation 

 does outcrop, however, in Walcott's "Phillips Mountain"; and, since this 

 is the real Mount Lynx, the name Lynx is entirely appropriate to the 

 formation (§24). 



MAHTO MOUNTAIN (§ 15) 



Mahto Mountain was proposed by Walcott for the ridge separating 

 Smoky Eiver from Calumet Creek. The Mahto formation is better ex- 

 posed, because of its observable relations to fossiliferous overlying and 

 underlying formations in Mumm Peak (§ 16), but the name Mahto has 

 been retained. 



MUMM PEAK (§16) 



Mumm Peak^^ (9,740 feet) is the high point directly north of Mount 

 Eobson, on the north side of Eobson Pass, and is described by Walcott as 

 exposing the Hota, the Mumm (typically), and the Titkana, and by 



18 Wheeler : Canadian Alpine Journ., vol. 4, 1912, p. 36. 



