298 GEOLOGY OF THE NARRAGANSETT BASIN. 



another of 40° E. on Sachuest Beach, south of the ridge, remaining to show 

 the real structure of the series of which this eastern ridge forms a part. 



At the north end of the western or principal ridge the lower eastward 

 dips show that the syncline is more shallow northward. The low dips 

 seem to continue northward, since the remaining conglomerate exposures 

 as far as the east-west road fail to bring up on end the interbedded sand- 

 stones, and so their dip can not be determined North of the road, how- 

 ever, in a field a fifth of a mile west of the road corners, conglomerate is 

 exposed with a strike N. 30° E., dip 20° E., lower eastward. North of the 

 road corners above mentioned blue sandstone with a little conglomerate 

 dips low eastward, and seems to pitch southward. A sixth of a mile south- 

 ward, west of the angle of the road, similar sandstone is exposed in a field. 



HANGING ROCKS. 



The Hanging Rocks, along the western side of Gardners Pond, form 

 the southern end of another great ridge of coarse conglomerate. The strike 

 of the conglomerate in the ridge is N. 16° E., dip 70° W., in some places 

 almost vertical. Overlying it on the western side, northward, is a bluish, in 

 places shaly, sandstone. This Hanging Rock ridge of conglomerate is 

 about half a mile long. It seems to form the eastern side of a great 

 southward-pitching syncline, of which the Paradise Rocks form the western 

 side. Seen from one of the great trap ridges in the central area of this 

 synclinal district, the topography favors such an interpretation of the series. 

 Immediately east of Hanging Rock, north of the bend at which the road 

 skirting it turns eastward, a low ridge of conglomerate is found, west of 

 the brook. Its dip seems to be steep eastward, nearly vertical. Other 

 exposures are found farther northward, west of the brook. East of the 

 brook is another low conglomerate ridge extending southward into Gardners 

 Pond and forming the eastern border of the narrow division of the pond 

 into which the brook empties. The strike of the main exposure here on 

 the west side is N. 16° E., dip from 80° W. to vertical. The fact that 

 this exposure lies east of the line of strike of the exposures farther north, 

 on the west side of the brook, which sometimes show eastward dips, should 

 be noted. Along the eastern side of this promontory, near its southern 

 end, the dip is about 60° E. This eastward dip continues to be shown 

 by the continuation of the eastern side of this line of exposure northward, 

 being 40° E. in the fields north of the road, the strike being N. 20° E. 



