344 GEOLOGY OP THE WAREAGANSETT BASIN. 



sandstones, and conglomerate of western Bristol Neck are considered as 

 belonging at the top of the Kingstown seiies. The sandstone exposures 

 on Popasquash Neck probably belong to the same horizon. 



Rumstick Neck. — The green shales of Rumstick Neck resemble the green 

 shales of western Bristol Neck and some of those of Prudence Island. 

 The sandstone underlying the same, offshore toward the southwest, contains 

 plant-stem impressions similar to those found in the sandstones beneath 

 the shales on the western side of Prudence Island The curve of the 

 strike of the sandstones suggests a shallow syncline pitching northward, and 

 a similar curve in the strike of the chief sandstone bed on. the southwest 

 side of Bristol Neck suggests a similar structure there. The exposure on 

 Rumstick Neck is, however, too isolated to be safely correlated. 



Kingstown sandstones equivalent to the lower part of the Coal Measures group. It the Stl'lkeS Ot 



the coaly shales, the sandstones, and the conglomerates on the western 

 side of Bristol Neck be continued for any considerable distance northward, 

 rocks referred by Mr. Woodworth to the Seekonk section will be met. The 

 Kingstown series would therefore seem to correspond to the lower part of the 

 Coal Measures, including the Seekonk group, as limited by Mr. Woodworth 

 farther northward. 



Triangular area of the Kingstown series in the Narragansett Basin, narrowing southward. Provided 



that all the correlations so far made are correct, the following fact is brought 

 out. In the latitude of the Bonnet the Kingstown series occupies a width 

 of 3<f miles. The eastern margin of the area occupied turns northeastward 

 at Beaver Head, with a direction of N. 38° E., as far as the eastern side 

 of Conanicut. At the latitude of Hammond Hill the series occupies a 

 width of at least 5 miles. At Hammond Hill the western margin of the 

 area turns northwestward, and in the neighborhood of Wickford Junction 

 the width of the area is about 85 miles. According to this measurement 

 the eastern border of the area takes a more northerly course along the 

 east side of northern Conanicut. From Wickford Junction the western 

 border extends N. 23° E. to East Greenwich, and the eastern border N. 

 24° E. along western Prudence Island to the eastern side of Popasquash 

 Neck. The width of the Kingstown area at East Greenwich, according to 

 this, is 8 miles. North of Coweset the western margin extends in a north- 

 western direction as far as southern Cranston, and thence N. 10° E. The 

 eastern margin may extend northward along the western side of Warren 



