MARYLAND GEOLOGICAL SURVEY 



77 



ally sank beneath the encroaching ocean, the waters worked their 

 way up the sinking valley of the Susquehanna and its tributaries, 

 converting them into estuaries, until it had arrived approximately 

 at the position indicated in the accompanying diagram (Fig. 3). 



Fig. 3. — Showing position of Talbot shore-line. 



Here it came to a standstill and remained in that position long 

 enough to cut a third series of sea-cliffs in the more exposed head- 

 lands. It will be seen that the aspect of Cecil county during the 

 Talbot stage was not very different from what it is today. It was 

 simply an enlargement of the Chesapeake Bay and its system of 

 estuaries. It was at this time that the lower terrace now extending 

 from tide to a height of 40 or 45 feet was deposited. 



