LOWER CAMBRIAN TERRANE 317 



In the shales just above the limestone the Paradoxides fauna 

 is largely developed. It extends up through 66 feet of shale 

 and interbedded limestone to the base of the Upper Cambrian 

 or Olenus zone. Six feet above the thickest band of limestone, 

 in which Paradoxides davidis occurs, there is a thin layer of 

 calcareous conglomerate, varying from 2 to 6 inches in thick- 

 ness. It contains many dark argillaceous concretions, also peb- 

 bles of a reddish siliceous rock. This narrow band of con- 

 glomerate is found on both sides of the river, and it is taken as 

 the base of the Upper Cambrian. Of the fauna occurring be- 

 low it one species of Agnostus and one brachiopod, OboJus 

 {Lingulella) /erruginetis , pass up into the Olenus fauna. 



The relative positions of the subfaunas of the Cambrian 

 fauna are indicated by figures 9 and 10. 



Chapel Cove Section. — Holyrood Point, Conception Bay, 

 Newfoundland. 



Lower Cambrian., do-vnward. — Feet. 



I a. Reddish-purple shale, with numerous layers of nodular 



limestone, some of them 18 inches in thickness 28 



Fossils : 



Agnostus? sp. undet. 

 Olenellus i^H.^ broggeri 

 Agr aulas stremius 

 Agraulos sp. undet. 

 lb. Green argillaceous shale, with bands of pinkish nodular 



limestone in the upper 20 feet 156 



Fossils : 



Numerous fragments of the slender tubes of Coleoloides 

 were noticed in the limestone nodules. 

 10. Pinkish and reddish-purple-colored nodular limestone in 



two beds, 24 inches and I3 inches 3 



Fossils : 



Fragments of trilobites were abundant, but no specimens 

 were obtained that could be identified. 

 id. Reddish-purple argillaceous shales, with scattered nodules 



of greenish and pinkish limestone 22 



Strike N. 50° W. mag., dip 45° SE. 

 Fossils : 



Iphidea lab radar ica 

 Obalella atlantica 

 Olenellus (^LI.) broggeri 

 Solenopleura ? bombifrons ? 



2. Pinkish quartzitic sandstone 6 



Proc. Wash. Acad. Sci., J.inuarv, 1900. 



