1914-] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 383 



ing to limonite, is most conspicuous and occurs as large irregular 

 gfrains and areas surrounding; fossil fragments and associated with 



Fig. 6. Microphotograph of limestone, 219 Bsd; slide 254; enlarged 22 

 diam. a, calcite; b, quartz; c, phosphatic? nodules. 



more calcareous portions. Hematite (Fig. 7, Slide 257) is found 

 in the more jaspery or laminated areas as irregular grains, aggrega- 

 tions, and spherules associated particularly with the green area which 

 for the most part is of an indeterminable character. Veins of cal- 

 cite are found cutting the nodule. As in the layer above, there are 

 found in this one (Fig. 8, Slide 253), certain semi-isotropic nodular 

 areas or pebbles which are partially chloritized. It is very pos- 

 sible that these nodular or pebbly areas are similar to the phosphatic 

 nodules of 219 A 13 to be described later. These alter to carbonate 

 locally. Among the organic remains are fragments of shells, hyo- 

 lithes, trilobites, and sponge spicules, which in part show carbonate 

 and chloritic replacement (Fig. 5, Slide 254, and Fig. 7, Shde 257). 

 219 A I. Disconformably upon the above described nodular lime- 

 stone there rests about 34 feet of a hard, fissile, green shale. About 



PROC. AMER. PHIL. SOC., I.IV, 220 AA, PRINTED FEBRUARY 23, I916. 



