250 GEOLOGY OF THE NARRAGANSETT BASIK 



toward the northwest is seen northeast of the last exposure, near the north- 

 east end of the most northerly walled field on the hill. Here a strike of 

 N. 12° W. becomes N. 40° W". in a very short distance northward. The 

 dip is steeper than nsnal here, 60° E. The most northern exposures, 

 near the cove, show a northwesterly strike and an eastward dip of about 

 35°, as nearly as it can be determined. 



The next set of exposures westward is at the angle of the road a little 

 over a quarter of a mile south of Hamilton. Here the strike is N. 30° W., 

 dip 66° E., rather well shown by the contrast of the dark finer-grained and 

 the coarser white sandstone. The latter, in places, contains very small 

 pebbles. West of Hamilton a quarter of a mile a road leads northwest- 

 ward and connects with another road leading to Wickford. Along both 

 sides of the first road exposures are numerous. One near the road gives a 

 strike of N. 40° W., dip about 45° E.; there is contortion along the strike. 

 Along the ridge at the western end of a row of houses, south of a pond, 

 the strike is N. 12° W., changing to N. 20° W., dip apparently 50° to 60° 

 E. North of this pond considerable coaly fine-grained rock is shown on 

 the south side of the road, with apparently a nearly horizontal bedding and 

 a slight dip northeastward. On the eastern side of the connecting road 

 to Wickford there are good exposures upon a rather high hill. Toward 

 the north, one exposure exhibits a strike of N. 18° W., dip 60° E., finely 

 shown by a very carbonaceous, fine-grained shaly layer in the coarser white 

 sandstone. In this entire series of rocks the coarser white sandstones pre- 

 vail; they contain but few pebbles and these are always small. Finer- 

 grained, more carbonaceous layers, with ottrelite locally, occur here more 

 frequently than to the westward. West of Hamilton, toward Indian Corner 

 (marked AUenton on the maps), about halfway between the two villages, a 

 large exposure on the south side of the road shows a strike of N. 20° W, 

 dip 45° E., well exhibited by alternating dark fine-grained rock and white 

 coarse sandstone. Around Indian Corner, exposures, chiefly of coarse sand- 

 stone, often with pebbles, are numerous. The strikes are variable, being on 

 the average N. 27° W., dip 30° to 45° E. A little over half a mile south 

 of Indian Corner, in the roadside and northeast of the house, a bluish Car- 

 boniferous sandstone shows strike N. 45° W., dip 50° E. This occurrence 

 agrees very well with the apparent northwesterly trend of the line of granite 



