230 GEOLoay of the i^^arragansett basin. 



east of Sand Point, which lies on the western shore. Here are found gray- 

 sandstones and shalesj with a strike of N. 8° E. and a vertical dip. In a 

 small embayment to the ^onth, almost east of the crest of the unnamed 

 100-foot hill indicated on the map, is black shale, often coaly. In one 

 of the coaly shale layers in the most indented part of this embayment, 

 fossil fern leaves are not xmcommon. The strike is N. 13° E. and the dip 

 vertical. South of this embayment occurs a line of sandstone, with a 

 strike of N. 13° E. and a dip which is almost vertical, but slightly inclined 

 toward the west; but there are very low dips in various directions farther 

 south, indicating crumpling and folding in the rock. As the shore begins 

 to curve toward the SSE. exposures are wanting, but farther south there 

 is a grayish sandstone striking N.-S., with a dip of 70° to 80° E., toward 

 the southwest of which is a dark shale, and farther southwest occurs a black 

 coaly shale with a strike N. 9° E. For some distance southward there is an 

 absence of exposures. Farther south, past the mouth of a little stream enter- 

 ing the bay, more of the coaly shale occurs, in the most western portion 

 of this long embayment. A short distance south of a point directly west of 

 the southern end of Grould Island black shales occur, with irregular dip and 

 strike, indicating crumpling of strata. It is near the old ferry, and is the 

 most southern of this series of rocks on the east shore. 



A line connecting the small embayment immediately south of the old 

 ferry with the pond east of Fox Hill would indicate approximately the 

 eastern limit of the Kingstown sandstones with conglomerates and the coaly 

 shales. South and east of this line lies the great Conanicut shale series, 

 which is a part of the Aquidneck shale series, hereafter to be described. 



The strike of both the eastern and the western portion of the exposures 

 in northern Conanicut averages about N. 8° E. Along the western shore 

 there is no marked crumpling, and the dip is distinctly east, averaging 

 perhaps 40° to 60°. On the eastern side the dips are frequently vertical, 

 and sometimes horizontal, as though considerable folding and crumpling 

 would be shown if there were any long vertical sections across the strike 



The western portion of the northern half of the island shows consid- 

 erably more metamorphism than the eastern portion, and the most meta- 

 morphosed portion is that bordering the shore along Slocums and Great 

 ledges. 



