I9I4.] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 399 



219 B 5 limestone and those about to be described in beds 219 A 11 

 and 219 A 13, and are probably phosphatic pebbles in compostion. 

 The minerals in evidence in this bed are hematite, calcite, and barite. 

 This bed is undoubtedh^ a manganiferous bed as shown by the oxi- 



FiG. 22. Photograph of vertical polished section of banded manganese 

 carbonate-oxide ore from 219 Ay, natural size, a, red band ; b, brown band. 



dized weathering products. The bed as a whole resembles 219 A 11 

 which to all appearances is suggestive of mineralized reworked 

 material. 



219 A 6 is somewhat fine-grained and gritty red shale, measuring 

 0.4 to 0.5 of a foot in thickness. 



219 A 7 is the main manganese-bearing bed, measuring .7 of a 

 foot in thickness. This bed is of more than usual interest in that the 

 manganese occurs as primary carbonates and oxides in the form of 

 thin jasper-like bands of green and light chocolate brown color, 

 and as lenticles, and nodules. Interlaminated with the jaspery bands 

 are reddish bands with manganese essentially in the form of an oxide 

 and a carbonate (Fig. 20, 21, and 22). This bed has been divided 

 into three layers, a, b, and c. The lowermost or a subdivision is the 

 reddish band which is essentially a manganiferous shale. It is nodu- 



PROC. AMER. PHIL. SOC. , LIV. 220 BB, PRINTED FEBRUARY. 25, I916. 



