MARYLAND GEOLOGICAL SURVEY. 



ST. MARY'S COUNTY, PLATE 



Fig. I. — VIEW shuwinc section of suxheklaxd fukmatiox near s 



T. MAKY S ( ITY. 



Fig. 2. — VIEW SHOWIXG AJIPHITHEATRE at head of VOUXG valley IX SUXnERI.AND FORMA- 

 TION NE.\R MORGAXZA. 



