CHAPTER IV. 

 THE NORTHERN SHORE OF THE BAY. 



PROVIDENCE RIVER AND EASTWARD. 



The geology of the area directly east of Warwick, on the eastern side 

 of Providence River, in Barrington, is not well disclosed by outcrops. 



It will be remembered that the strike of the exposures west of Rocky 

 Point was a little west of north and the dip low east, about 20°. The 

 strike would carry these rocks a little west of Pawtuxet village. At the 

 mouth of the Pawtuxet . River sandstone is exposed, and the neck upon 

 which a part of the village is built is apparently underlain by a similar 

 rock. This sandstone could easily belong to the Rocky Point series, if the 

 Rocky Point exposures be correlated with the exposures on the eastern side 

 of the river. 



These eastern exposures extend from East Providence, north of 

 Watchemoket Cove, along the shore as far as a point directly west of 

 Riverside Station. This section is chiefly sandstone, although at certain 

 horizons conglomerate layers are abundant. In the region east of the 

 Pomham rocks a local syncline can be detected. Immediately east of this 

 syncline there are a number of exposures with westerly dip. 



Half a mile east of the Pomham rocks there are three ridges in 

 obliquely overlapping order, from south to north. The middle ridge shows 

 a westward dip of 30°. The middle and northern ridges contain considera- 

 ble conglomerate. The southern ridge consists chiefly of sandstone. 

 Isolated exposures occur north of the series of ridges. No perfectly 

 satisfactory stratification planes can be made out in the northern and 

 southern ridges. This leaves room, of course, for the supposition that east- 

 ward dips may occur in them and that we have here a series of closely 

 folded anticlines and synclines. 



259 



