CAMBRIAN OF NORTH ATTLEBORO. 389 



At locality 1, just north of the road leading eastward down from 

 Hoppin Hill, there is a small knoll, composed chiefly of shale, more greenish 

 westward, where it includes a few thin white quartzite layers, strike N. 10° 

 E., dip 80° W.; reddish eastward, where the shale includes limestone layers, 

 pinkish where fresh, red where strongly weathered. (Map, PL XXVII.) 



In the limestones were found the following fossils: Stenotheca ragosa 

 var. pauper, Pleurotomaria (RapMstoma) attleboroensis, Fordilla troyensis? 

 left valve, Hyolithes princepsf E. Ullingsi, Hyolitliellus miccmsf, Salterella 

 curvata. Northeast of locality 1 , 50 feet, are found some very small exposures 

 of red shale with limestone layers, including Agraulus strenuus, strike X. 10° 

 E., dip 70° W. Farther northward 100 feet, a little east of north from locality 

 1, is another knoll with red shale on the eastern side, containing red lime- 

 stone with Hyolithes and Hyolitliellus. The ridge itself is composed of 

 greenish and reddish shales on the eastern face, and greenish shale including 

 thin sandstone and quartzite beds along the middle and western sides. 



About 150 feet north of the last-mentioned knoll, or 340 feet north 

 of locality 1, reddish shale, abundantly cleaved in various directions, occurs 

 just west of the stream, and another exposure occurs near by on the eastern 

 side of the stream. West of these localities green and red shales occur, 

 also much cracked; 50 feet farther north, and again 110 feet farther north, 

 limestone bowlders occur. Another limestone bowlder is found about 50 

 feet west of the last-mentioned bowlder and about 525 feet a little west of 

 north of locality 1. 



About 560 feet almost directly north of locality 1 and just south of a 

 small stream red shale is found including thick red limestone beds in almost 

 vertical position. Thirty-five feet northwest of the same red shale occurs; 

 50 feet directly westward occurs limestone containing Hyolithes and Hyoli- 

 tliellus, strike N. 50° E., dip vertical. 



Thirty feet northwestward is the beginning of a set of greenish shales 

 including numerous quartzite layers, the most eastern one 12 inches thick, 

 the intermediate ones a few inches in thickness, the most western la^^er 

 nearly 2 feet thick and white in color, strike N. 21° E., dip 60° E. 

 About 25 feet northeast of this most western exposure a similar thick 

 quartzite layer with a similar strike occurs. 



About 110 feet east of the last-mentioned quartzite exposure, on the 

 northern side of the small stream already mentioned, a series of red shale 



