gap AMBRICAN GHOLOGIST, VoL. X XIX, 
er = 
Lgs 
Vi Sa 
s ee = 
LEGEND 
a= Older Crystalline 
Formations. 
= Slate. 
Conglomerate. 
R. 
MAILE 
L 
a ea 
EE | 
| Lig 
; ee, ZZ CFP LUI] Felsite and Melaphyre. 
Geological Map of the Charles River Basin and Vicinity. Seale 1,250,000. 
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