BUTTS HILL. 327 



more bluish in color, is seen again north of the brook, along the south side 

 of an east-west road; strike N. 20° E., dip very steep eastward. In the fields 

 north of this road the shale continues to be exposed, and just before reach- 

 ing the road which crosses the 140-foot hill (see map, PI. XXXI) southwest 

 of a house the bluish shale is exposed, and contains a more sandy layer 

 just south of the building; dip not certain, strike apparently N. 35° E. 



SHALE SERIES AT BUTTS HILL. 



Three-quarters of a mile northeast of Butts Hill, along the eastern 

 Newport road, carbonaceous shale with fern leaves and other plant remains 

 occurs. Strike N. 6° E., curving to N. 20° W at the north end of the 

 exposure; dip 15° to 20° W. Northeast of Butts Hill, along the same 

 road, just north of Chas C. Hazard's house, a coal mine was formerly worked. 

 The strike of the beds is N. 15° E., dip 15° to 20° W. The structure of 

 the northern third of Aquidneck Island is evidently that of a syncline. 



All around the top of Butts Hill, especially in the neighborhood of 

 the old fort, the bluish-black and coaly shale is frequently exposed. North 

 of the old fort and just south of the road crossing the hill is an old quarry. 

 Near the top of this exposure the blackish shale contains fern-leaf impres- 

 sions. The dip of the shale is low, 5° to 10° S. In places there is evidence 

 of much crumpling here by a force acting east and west, and the result is a 

 series of narrow folds trending north-south and giving rise to variable east- 

 west dips, generally to the westward along the east side of the hill. Butts 

 Hill evidently lies in the trough of the syncline. 



GREEN SHALES AND CONGLOMERATES OF THE NORTHERN SYNCLINE. 

 GREEN SHALES ALONG THE WESTERN NEWPORT ROAD. 



Half a mile north of the point where the Newport road crosses Lawton 

 Valley greenish-blue and bluish shales occur along the road and imme- 

 diately westward. The strike is about N. 10° E., dip probably 20° E. A 

 mile northward, on the east side of the road, greenish-blue slate and sand- 

 stone strikes N.-S., dip 20° to 40° E., as well as could be determined. A 

 quarter of a mile northward, at an angle of the road, more greenish shale 

 occurs. Three-eighths of a mile northward the green shale is seen exposed, 

 east of the road corners, on the south side of the road. Green shales occur 



