S. GEOLOGICAL SURVEY 
BULLETIN NO. 136 PL. XIV 
X 
7» 4*. ■' 
% 
4: ** 
'%* ■: 
#, 
## ?£ 
SERICITE SCHIST. 
From exposure on the Gettysburg Railroad just below (east of ) the Clermont House. One-half natural size. It 
shows the dendritic markings which are frequently to be seen upon the cleavage surfaces of the acid slate. 
