I9I4.] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 411 



Loc, Number. 



210 E 10 Brown shales with manganese at base Open cut 



9 Brown shales with limestone at base. 

 8 Heavy limestone. 



Ft. 



7 Shaly limestone 6.0 



6 Brown sandstone with limestone nodules 3.0 



5 Fine and coarse sandstone with small limestone nodules.. 6.0 

 4 Much sheared brown shale with limestone nodules and 



manganese at base 4.0 



3 Mouth of tunnel and rotten zone 15.0 



2 Coarse sandstone 6.0 



I Shear zone , 0.3 to 0.5 



o Pre-Cambrian 25.0 



It is quite apparent from a study of the above section that the 

 lower Cambrian at Topsail is in many respects similar to that of 

 Manuels. The absence of a basal conglomerate and the presence of 

 sandstone are the most striking features of the associated beds. 

 During the summer of 191 3 a more detailed study of the manganese 

 zone of 210 E 10 of the generalized section was made and the 

 following subdivisions were made : 



Loc. Number. Ft. 



219 E 7 Green shale, badly broken. 



6 Banded, concentric and nodular shale i.o 



5 Green shale, badly sheared 0.5 



4 Manganese oxide-carbonate ore 1.4 



3 Broken nodular green shale with manganese stain 0.7 



2 Calcareous manganiferous shale 0.3 



I Hard nodular olive green shale, badly weathered and sheared, 

 with manganese stain. 



Of this series two beds, 219 E 4 and 6, are worthy of more de- 

 tailed description, 



219 E 4 is an oxide-carbonate ore of manganese of 1.4 ft. in 

 thickness. It is irregularly banded and nodular, of chocolate-brown 

 color, somewhat vitreous in appearance and argillaceous, with a 

 hardness of 5 to 6 and specific gravity of 3.26. Disseminated 



