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SCALK, 1 Milk to 1 Urn 



GEOLOGICAL M\t> 



MASSACHUSETTS 



WMm 



ItY 



^Y. O. CROSBY. 



1877. 



Explanation of Colors. 



Naugus Head Series 



Shawm at Grou /i 



llt/ro/t i(( n 



Gru.„it<- 



Pel rosi I e.v 

 I Diorilc 

 l/tirnl/leiit/icl'ititx.s,fi 



Limestone 

 General Ihiro/t itt/i 



Granite 

 Gneiss 



Mo//l it I liit it ' Mtcft Slate 

 Argillite 

 Li in est (in e 



/'/•tin t/rdia I 



□ 



CJ 



I Amygdaloid 



I Ctiinflwiimtle 

 I Slate 



Devonian? I 



Carboniferous I 



Post I'lioceii e 



Sliawmnl Breccia (tint Amygdaloid 

 hit no/ distinguished, on the small 

 Map I'ri in aril ail SI (lie and (bin/loin 

 ('/■alt ditto. 



A , / 7^t 





f 



^ 





ArroWt rind aeCOmpUn) i/ift >uj 



