NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 323 



UPPER CAMBRIAN 



GooDSiR Formation (See p. 232.) After Allan p^^^ Meters 



I. Thin-bedded, alternating bands of bufif and gray, soft 

 argillaceous and calcareous shales, with harder bands 

 of siliceous and dolomitic shale weathering to a fawn 

 and light yellow color. The preceding applies to the 

 formation in Striped Mountain and in the Beaver foot 

 Valley. 



On Mount Goodsir the formation consists of cherty 

 limestones, banded cherts, shales, thin-bedded sili- 

 ceous and dolomitic limestones interbedded with sili- 

 ceous shale 6,040 1840.9 



Fauna. — The known fauna (Hntisia) is confined to the 

 lower 300 feet (91.4 m.) of the formation and, as far 

 as can be determined, includes essentially the same 

 forms at all the localities discovered. The most pro- 

 lific locality gave the following forms : 



Obolus mollisonensis Walcott 



LingidcUa mooscnsls Walcott 



Lingulella sp. 



Agnostus several species 



Monsia dcgcncr Walcott 



Mnosia grandis Walcott 



Housia allani Walcott 



Housia canadensis (Walcott) 



Housia gracilis Walcott 



Ottertail Formation ^ 



1. Massive blue limestone weathering gray 425 129.5 



2. Massive blue limestone, with a few shaly bands 408 124.4 



Thickness of i and 2 estimated 833 253.9 



3. Massive limestone, some beds 15 feet (4.6 m.) thick... 100 30.5 



4. Massive limestone, with a few interbedded dolomitic 



bands 99 30.2 



5. Blue limestone, thinly bedded, with oolitic layers 6 to 



10 feet (1.8 to 3 m.) thick 26 7.9 



6. Massive bed of blue limestone, shows irregular lentils 



on weathered surface 112 34.1 



7. Concretionary, bluish limestone, weathers dark gray.. 62 18.9 



8. Shaly blue limestone, weathers into lens-like fragments. 90 27.4 



9. Massive blue limestone in thick beds 100 30.5 



10. Arenaceous limestone, with calcite stringers 6 1.8 



11. Limestone beds about 5 feet (1.5 m.) thick, some gray 



lentils on weathered surface 25 7.6 



12. Thin, alternating layers of calcareous and dolomitic 



limestone weathering gray and black 10 3,1 



^ Section copied from Allan as it occurs in the Ottertail Escarpment, Geol. 

 Surv. Canada, Mem. No. 55, 1914, pp. 91, 92. 



10 



