CAMBRIAN CORDIIvLERAN SECTIONS — WALCOTT 203 



Vanuxcmclla contracta, new genus and new species. 

 Bathyttriscus productus ? (Hall and Whitfield) [1877, p. 



244]. 

 Bathyiriscus ? . 



This fauna is strikingly similar to that occurring in the drift 

 blocks which are believed to have come from the lower portion of 

 the Mount Whyte formation of the Mount Bosworth section [see 

 page 214]. At the localities in question neither fauna contains Olen- 

 ellus, but that genus occurs so generally in the Mount Whyte forma- 

 tion, both above and below the Albertella horizon, that the entire 

 formation is placed in the Lower Cambrian. This correlation places 

 shale No. 6 and sandstone No. 7 in the Lower Cambrian. 



SANDSTONE: 



Feet 



"ja. Thin-bedded sandstones, with partings of dark arenaceous shale 70 

 Many varieties of annelid trails and tracks of trilobites occur 

 on the surface of the sandstone. 

 yb. Massive bedded, coarse, more or less cross-bedded, light gray 

 sandstone, with a few thin layers of fine quartzitic con- 

 glomerate 80 



Total of sandstone 150 



RfiSUMfi, DEARBORN RIVER SECTION 



Feet 



1. Limestone 1,320 



2. Shale 150 



3. Limestone 130 



4. Shale 210 



5. Limestone 55 



6. Shale 190 



7. Sandstone 150 



Total of Cambrian 2,205 



Beneath the Cambrian sandstone the Empire shales of the Belt 

 Terrane of the Algonkian occur with apparently the same strike and 

 dip as the base of the sandstone. Traced on the strike, however, 

 they appear to be unconformably beneath the sandstone. 



