I9I4.] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 405 



bonate are found in a groundmass the character and composition of 

 which is for the most part indeterminable. Occasional pyrite grains 

 are found (Fig. 26, Slide 280). 



219 A lod, the upper subdivision, consists of 0.3 of a foot of 

 nodular and oolitic dark gray shale with thin jaspery manganese 

 carbonate laminations. 



Subdivision e is a dark green nodular and oolitic shale, 0.8 of a 

 foot in thickness and not very different from the layer d just de- 



FiG. 26. Microphotograph of oolitic manganiferous shale from 219 Aioc; 

 slide 280; enlarged 22 diam. a, hematite spherules; b, shale with dissemi- 

 nated hematite. 



scribed, and f — is a coarse nodular seam, 0.8 of a foot in thickness, 

 in a dark green shale, comprising the uppermost portion of this bed. 

 219 A II is a heavy tough reddish band, 0.5 of a foot in thick- 

 ness and lithologically very different from the immediately over- 

 lying and underlying beds. For the most part, the structure is both 

 somewhat nodular and oolitic. The general fragmentary nature of 

 the fossils and of certain nodular or pebbly forms leads one to think 



