GENERALIZED SECTION 



725 



\J 





Feet 



Feet 



Chetang limestones (§29)... 



900 



Chetang limestones (§29)... 950 



Bluish gray thin - bedded 





Thin-bedded blue limestones 



limestones. 





with some shales. 



Thickness in Chetang cliff. 





Thickness in Chetang cliff. 



Fossils : An upper horizon 





Fossils : Abundant in many 



and a lower 250 feet be- 





horizons. Alhertella was 



low, with Alliertella. 





found in Chetang cliff, 

 and in several horizons 

 on Mural Brook, and in 

 the summit of Mumm 



Total Middle Cambrian 



6,200 



Peak(§29&). 



' Lower-Middle Cam- " 







< brian boundary ^ — 



^ Walcott ( § 8a) . 







Lower Cambrian : 







Hota formation ( § 30) 



800 



Adolphus limestone (§30)... 400 



Gray arenaceous limestones 





Gray arenaceous limestone, 



and siliceous shales al- 





changing on the strike. 



ternating with massive 





near the base, to thin- 



quartzitic sandstones. 





bedded blue-black lime- 

 stones. 



Thickness obtained from 





Thickness obtained in 



an exposure of the "Tah" 





Mumm Peak (§§30/, 30^^, 



in Mumm Peak, near 





32c). 



Mural glacier, and lith- 







ology is descriptive of the 







"Tah" (§30(Z). 







Fossils : Walcott (personal 





Fossils : Well-defined Mid- 



communication ) s t a te s 





dle Cambrian fossils were 



that the "new Lower 





found at two horizons in 



Cambrian subfauna" with 





the thin-bedded 1 i m e- 



Oleiiellus was referred by 





stones at the base of the 



error to the Mahto and 





Adolphus. 



belongs here (see § 32(? 





The "new Lower Cambrian 



and note opposite). 





subfauna"' of W a 1 c o 1 1 

 does not occur in the 

 Adolphus ("Hota"), but 

 in the "Tab" (see §32c). < 



Total Middle Cambrian 4,900 



r Lower-Middle Cam- 







< brian boundary, > 



1 Burling (§8). J 







Lower Cambrian : 



Mahto sandstones ( § 31) ... . 



1,800 



Mahto sandstones (§31) 1,200 



Massive - bedded quartzitic 





Comparatively thin-bedded 



sandstones with bands of 





quartzitic sandstones with 



siliceous shale. 





purplish sandy shales. 

 Thickness estimated in 

 Mumm Peak (§3M). 



Fossils : None (page 339 of 





Fossils: I first placed the 



Walcott). (See footnote 





"new Lower Cambrian 



in § 31c.) 





subfauna" with Olenel- 

 lus and Pwdeumias here 

 ( § 32(Z ) , but as the bound- 

 ary is now drawn that 

 fauna belongs with the 

 "Tab." No other fossils 

 found. 



