46 



Loughlin and Ilechinger — Unconformity 



Fig. 1, 



42 30 



71° JO' 



42 



41 30 



conglomerate 



Wamsutta formation 

 and Pondsille Cgl 



Giant Conglomerate 

 of Blue Hills 



— UNCONFORMITY 

 Coal Measures" 



— UNCONFORMITY 

 Cambrian formations 



Alkaline (Ouincy) 

 grumte 



Biottte Granites 



Dtdna m?Milf"d?Mat 1 - 

 6ndge, Ster/i 



E. Greenwich 

 granite group 



Fig. 1. Map showing distribution of formations in and around the Narra- 

 gansett, Norfolk County and Boston Basins. Narragansett Basin after 

 Woodworth and Foerste, western border of Narragansett Basin (except 

 southern part) after Emerson and Perry, Norfolk County Basin generalized 

 from the writers' reconnaissance work, Boston Basin largely after Crosby and 

 Mansfield. 



