J 10 



THE GEOLOGY OF CALVERT COUNTY 



previously in the erosive interval which followed the uplift of the La- 

 fayette formation has been discussed elsewhere. 



After Calvert County had been subjected to erosion for a certain 

 period, it was again submerged, but not to the same extent as in the 



Fig. 2. — Diagram showing approximate position of shore line of "Wicomico 



sea. 



previous cycle, during the deposition of the Sunderland formation. 

 The subsidence, however, was sufficient to drown the rivers which 

 had opened up their valleys across the county and to transform these 

 into estuaries, so that a waterway extended across Calvert Coiinty 



