U.S. GEOLOGICAL SURVEY 



Purgatory coarse conglomera te foo-Sooft 

 Green shaie £o~Jooft Sakonnet sandstone So-fSofr 



Aquidneck shales, Z7oo~J5ooft 



Prudence Island 

 Coa/y shale ho - /Sofr Coog/omQra he +coalyshafe 



Cbfig/o!7?erate, fteekyPfc } 



Kingstown sandstones J/Soo feef 



Basa.1 arfrose So- /So ■ft. 



SECTIONS IN THE N^ 



