LOWER CAMBRIAN TERRANE 315 



layers of nodular limestone occur, aggregating several feet in 

 thickness. The contained fauna is of the same character as that 

 in the Topsail Head limestone. The species noted were : I^hidea 

 labradortca, Parmofhorella rugosa, Colcoloides tyficalis^ Mi- 

 crodisctis helena, and numerous fragments of Olenclhis {H.') 

 broggeri. 



At Lawrence Pond, about 6 miles southwest of Manuels, a 

 layer of gray limestone, just above the highly altered Conception 

 slates of the Avalon series, was found to be very fossiliferous. 

 The species noted are : Scenella reticulata^ Parmofhorella ru- 

 gosa, Straparollina reinota, Hyolithes f, Coleoloides typtcalts, 

 Hyolithellus mtcaiis, Fordilla troyensis. 



Above this limestone the reddish-purple slates carry the same 

 fauna as along the railroad near Manuels. The stratigraphic 

 succession of the strata at Manuels and along the railway to 

 the southwest, shows that the Smith Point (Hyolithes) limestone 

 occurs immediately on the conglomerate, and above it the red- 

 dish-purple argillaceous shales, earthy limestone, etc., contain- 

 ing the Olenellus {H.) broggeri fauna. The limestone was 

 found in place near Manuels Station, but at several other local- 

 ities it appeared to be absent. 



Base of the Middle Cambrian in the Manuels Brook Section. 

 — On the southwest side of Manuels Brook, a short distance 

 below the falls and 45 feet up in the section above the basal 

 conglomerate, there is a stratum that corresponds in character 

 to the basal conglomerate of the Middle Cambrian or Paradox- 

 ides zone of the Smith Sound section. It is a ferruginous, 

 semi-conglomeratic, earthy limestone, with nodules of red 

 hematite in the upper portion, and irregular concretions, or 

 pebbles it may be, of pinkish limestone, in which fragments of 

 Olenellus and Agraulos were found. In places it is a solid 

 layer, 18 inches in thickness, and in other localities it breaks 

 up into two or three layers. Above this semi-conglomeratic 

 stratum green argillaceous shales in massive beds extend up- 

 ward with a thickness of 170 feet. Several la3'ers of manganese 

 occur in the lower portion, but no traces of fossils were found. ^ 



' In the ' Manuels Brook ' section of 1888, mention is made of the finding of 

 the head of an Olenellus and fragments of Agraulos or Ptychoparia near the 



