TABLE 1 

 Miocene and Post Miocene 

 Stratigraphic Column 

 Southeastern Virginia 



AGE AND GROUP 



FORMATION 



ELEVATION TO 

 TOP (FEET) 



LITHOLOGIC 

 CHARACTER 



Holocene 



Undifferen- 

 tiated 



Dune and beach, sand, 

 alluvium, lagoon silt 

 and clay 





Dismal Swamp 



+5 



Pleistocene 



Sandbridge 



-25 



(Columbia 







Group) 



Londonbridge 



-17 





Kempsville 



-2 





Norfolk 



-35 



Great Bridge 



-45 



Fresh water peat, clay 

 and sand 



Sand, clay and silt 



Lagoonal silt and clay, 

 beach sand and gravel 



Beach sand, gravel and 

 shell, lagoonal peaty 

 clay 



Beach sand and gravel, 

 lagoonal fluvial and 

 estuarine clay and sand 



Sand gravel, peat, clay 

 and silt 



Pliocene or Elberon +45 



early 



Pleistocene 



Bacons Castle +30 



Lagoonal clay and silt 

 littoral sand 



Fluvial and flood plain 

 fine silt, gravel, clay, 

 fine sand 



Pliocene 



Sedley 



Marine clay, silt and 

 fine sand 



Miocene 

 (Chesapeake 

 Group) 



Yorktown 

 St , Marys 

 Choptank 

 Calvert 



-30 to -160 



insufficient 

 data 



Marine clay, silt, sand 

 shells 



