GEOLOGICAL MAP 
OF THE 
AFTER 
C.H. HITCHCOCK. 
EASTERN UNITED STATES, 29 
Quaternary 
Tertiary 
Cretaceous 
Triassic 
Carboniferous 
Devonian 
Silurian 
Cambrian 
Huronian 
Laurentian 
[i 
Eg 
BER 
= 
= 
