US GEOLOGICAL SURVEY. 



[Clecumge clips 



HOPPER BROOK 



SEA LEVEL 



■fOE 2S-30'E 



*5 £ «*£. W 4S : f. W LOW BO'E. 



symond's pk. ! 



MT. GREYLOCK 



Vertical & Horizontal Scale sisbs or It inches-1 mile. 



SYMBOLS. 

 CHLOR-MICA fSER/CITEISCHIST 



CALCAREOUS MICA-SCHIST & LIMESTONE 



m places Ihe Schist is not Calcareous, in places Quartzife. . 



LIMESTONE _ _ 



QUARTZITE-- 



Afi/t" The, cleavage. •foliation is only shown crossing the 

 stratification -foliation wliere cleavage dip was determined 

 /in/ 1/ traverses the greater pari n/'l/u mass 



Observed 



\ Cinn-iK/i i/ips 

 \stni/<f" * 



SEA LEVEL 



,_3SOO FT. 

 3000 



2000 

 _ 1500 



( 7't-n-f/t/l (Zips 2S"E. SCMSr!S'ff3S-C 



Observed^ 



S //•(////'" " GREEN I 



L. VESTOtli *5 £ 

 1SH E E 40 E W 60'E.SO'i 



J3QOO i 



-2000 

 -1500 

 .1000 

 -500 



SEA LEVEL - 



