CODDINGTON NECK. 305 



exposures and those of Miantonomy and Beacon hills. The southward 

 pitch, so well shown on the hills named, indicates how it is possible to have 

 the regular dark-blue and black shale along the railroad cut north and 

 south of Coddington Cove along with a total disappearance of the conglom- 

 erate series. Anyone standing on the top of Beacon Hill, and knowing- 

 the distribution of the shale series northward, can not fail to be convinced 

 that the coarse conglomerates overlie that series. 



CODDINGTON NECK. 



The bluish-black shale series underlies Coddington Neck. Almost 

 continuous exposures occur along the western side of Coddington Cove, and 

 form the two main hills of the neck. At the north end of the neck these 

 shales strike N.-S. and dip 70° to 80° W. Farther west these dips are 

 less steep. About 225 feet southwest of the most northern point of the 

 neck fern-leaf impressions were found in the bluish-black shale. At the 

 northwestern angle of the neck coarse conglomerate appears, still dipping 

 westward, overlying conglomerate with medium-sized pebbles. Farther 

 along the coast southwestward, more conglomerate with medium-sized 

 pebbles is seen; then brownish sandstone, again the former conglomerate, 

 and then coarse conglomerate appear in succession, the second exposure of 

 coarse conglomerate appearing at the western angle of the shore where it 

 begins to turn southward. The dip of the coarse conglomerate here is very 

 steep eastward. In other words, a very compressed syncline has brought 

 down the base of the coarse conglomerate series. Southward from the 

 more southern conglomerate exposure, the bluish-black shale series is seen 

 to contain frequent narrow intercalations of a whitish sandy l-ock. 



BISHOP ROCK. 



The same series of blue-black and coaly black shales, with bands of 

 whiter rock, is exposed on the northwest side of Bishop Rock, striking N. 

 40° E. on the north side, toward Coddington Neck, and curving westward 

 and then southward so as to strike about N. 25° E. on the west side of the 

 rock. The series dips westward about 60°. Underlying it, southeastward, 

 is medium-sized quartzitic conglomerate, and beneath that is coaly shale, 

 evidently much folded and contorted. Fragments of arkose and other 

 rocks appear in the coaly shale as though they were pebbles, but the 

 3ION xxxiii 20 



