Formation name 

 (Walcott).' 



Remarks. 



Accepted formation 

 name (Burling). 



Estimated thickness 

 (Walcott). 



Measured thickness 

 (Burling). 



Robson limestones 

 (above Extin- 

 guisher fauna). 



Apparently absent from 

 Mount Robson region (§§ 

 2Sd and 23e) . 



Unnamed (§23/). 



3,000 feet in Mount 

 Robson. 



375 feet of Ordovieian shales 

 and thin-bedded limestones 

 occur above Extinguisher 

 fauna in Mount Rearguard 

 (§23/). 



Lynx limestones 

 (below Extin- 

 guisher fauna). 



Greatly enlarged by finding 

 ■3,000 feet of additional 

 strata between the top of 

 Walcott's Ijynx and the 

 Extinguisher fauna. 



Lynx formation 

 (below Extin- 

 guisher fauna). 



2,100 feet in "Lynx 

 Mountain" (§14). 



5,000 feet in the real Mount 

 Lynx and in Mount Rear- 

 guard. 



Titkana limestones. 





Titkana limestone. 



2,200 feet in Mount 

 Titkana. 



2,500 feet in Mount Titkana. 



Mumm limestones. 



Described and named from 

 an exposure of the "Hota," 

 which is now called Adol- 

 phus (§§26?), 306, 32c). 



(Absent.) 



600 feet in Mumm 

 Peak. 



It does not occur in Mumm 

 Peak (§§16 and 32c). 



Hitka formation. 



Merely a duplication of the 

 Titkana (§256). 



(Absent.) 



1,700 feet in Mount 

 Hitka. 



It is the Titkana which oc- 

 curs in Mount Hitka 

 (§276). 



Tatay limestones. 



Spelling changed to Tatei 

 by Canadian Geographic 

 Board (§21). 



Tatei limestones. 



800 feet in Tatay 

 cliff. 



1,000 feet In Mount Titkana 

 and Tatei cliff. 



Chetang limestones. 





Chetang limestones. 



900 feet in Chetang 

 cliff. 



9^50 feet in Chetang cliff and 

 in the top of Mumm Peak. 



Hota formation. 



Confused (stratigraphy, fos- 

 sils, localities, and mode 

 of occurrence) with the 

 "Tah," the Mahto, and the 

 "Mumm" ( § 30) . 



-Adolphus limestone 

 (§30ff). 



800 feet in Hota 

 cliff. 



400 feet below the Chetang, 

 in the top of Mumm Peak. 



Mahto sandstones. 





Mahto sandstones. 



1,800 feet in Mahto 

 Mountain. 



1,200 feet (estimated) in 

 Mumm Peak. 



Tah formation. 



Confused (stratigraphy, fos- 

 sils, localities, and mode 

 of occurrence) with the 

 "Hota," the Mahto, and 

 the "Mumm" (§32). 



Mural limestone 

 (§32ir). 



SCO feet in Tah 

 Mountain. 



1,000 feet in Mumm Peak. 



McNaughton sand- 

 stones. 



Left unnamed in Mount Rob- 

 son region (§336). 



Unnamed (§336). 



500 feet in Mc- 

 Naughton Moun- 

 tains. 



400 feet in Mumm Peak, base 

 not exposed. 



' Names in stratlgraphic order, youngest at the top. 



