US GEOLOGICAL SURVEY. 



MT. GREYLOCK 



Vertical S Horizontal Scale *nhre or It inches-1 mile, 



SYMBOLS. 

 CHlOtt-MICA ISERICITE)SCHIST_ _ ._ i ~ — ! 



LIMESTONE 

 QUARTZITE-- 



Not&: Tin tlr,i\a,/r foliation is only s'lunvn crossing die 



Slriifl/irtilltjyi-lh/lii/inii n-l/ivr c/rrn-nt/r f/i/i iry/.s , !r/rri,'n ,, ,;/ 

 bill il traverses tlir c/realerpaH of the muss 



Observed, 'Cleavage dips 



I Ml, ,/i /" 



( Clea.rcu/e dips 

 Observed ! 



\\//rtf/f"- 



SEA LEVEL 



Observed, 



| Oeewar/r dips 

 StraUf'.' 



MONOGRAPH XXIII PLXVIU 



Observed. S/rnli/" dip 



VrrOa/i „ / 



