lis THE GEOLOGY OF ST. MARy's COUNTY 



barrier beaches, and have passed over in vai-ying degrees to brackish- 

 water conditions bearing estiiarine faunas. 



Similar deposits to those Just described have been seen by the author 

 along the Rappahannock River, especially at Mosquito Point, and there 

 is no reason to doubt that they occur in many other places along Chesa- 

 peake Bay and its estuaries, within the State of Virginia. From analogy, 

 it would be expected that similar deposits would be discovered along 

 Delaware Bay where conditions must have been identical with those which 

 prevailed in Chesapeake Bay. That such deposits do occur along the 

 shores of the Delaware there can be no doubt. The most noted of these 

 is at Pish House on the New Jersey side of the Delaware River a few 

 miles above Philadelphia. 



