330 GEOLOGY OF THE N^AREAGAKSETT BASIN. 



begins. It is in the latitude of the Slate Hill sections, and thence ea^^t- 

 ward and westward to the shore on either side of Aquidneck Island, that it 

 is most difficnlt to secure evidence of marked strikes and dips, a character 

 often attending shaly rocks not steeply inclined, since the cleavage then 

 most readily obscures the stratification, not departing far from its plane. 



