326 GEOLOGY OF THE NABRAGANSETT BASIN. 



LINE OF EXPOSURES THREE-EIGHTHS OF A MILE WEST OF THE NEWPORT 



ROAD. 



Almost half a mile north of Lawtons Valley a much smaller stream 

 gully is seen extending down the hillside. On the south side, near the 

 railroad, carbonaceous black shale containing occasional fern-leaf impres- 

 sions is exposed. The dip is apparently very low eastward. Farther up, 

 the shale turns to bluish black. At the brow of the hill, south of the gully, 

 there occurs a small conglomeratic layer. Toward the top of the gully 

 sandy layers come in. 



The creek entering the marshy pond south of Coggeshall Pond also 

 shows dark blue-black shales, with interbedded sandy layers, in the banks 

 south of the valley and near the railroad. The clip is at first 40° E., 

 but becomes steeper eastward. The same series continues to be exposed 

 farther up along the valley, the strike at one point being N. 30° E., dip 

 very steep east. The rock contains sandy layers and in places also becomes 

 very carbonaceous. At the brow of the hill north of the creek a coarse, 

 thick, whitish sandstone layer shows a strike of N. 30° E., the dip appar- 

 ently 60° E. Southward this sandstone terminates suddenly, but north- 

 ward it continues for a long distance. To the eastward the shale series 

 overlies this sandstone again. The sandstone contains in places a few small 

 pebbles. It forms only a layer in the shale series. 



The coarse sandstone is exposed again three-eighths of a mile east of 

 north of the creek. Here again a few pebbles occur. Strike N. 12° E., 

 dip E. Northeast of this locality the same coarse sandstone is overlain by 

 carbonaceous shale; strike N. 20° E., dip 40° to 45° E. Southeastward, 

 halfway between the last two exposures and the Newport road, bluish-dark 

 shale is exposed at several localities, evidently overlying the coarse sand- 

 stone, and apparently dipping steep to the east. Northwest of the last 

 sandstone outcrop dark-bluish shale is exposed. It belongs beneath the 

 sandstone bed, but contains itself more sandy layers, and the dip is 

 eastward, although apparently only 20°. The last exposure extends as 

 far as an east-west road running to the beach. A quarter of a mile 

 northward a projection at the northwestern angle of the hill shows a more 

 greenish shale; strike N. 16° E., dip 60° E. Another exposure of the 

 shale occurs a quarter of a mile northward, south of the brook. The shale, 



