114 PHYSIOGRAPHY AND GEOLOGY OF THE COASTAL PLAIN PROVINCE. 



About three miles below the preceding locality, a very similar section 

 occurs on the left bank of the river, the chief difference being that only one 

 foot of Nanjemoy materials appears at the base. 



X. Section Mattaponi River, about fifteen and one-half miles below the 

 mouth of Marricossich Creel:. 



Feet 

 Pleistocene Sand and gravel 5 



Miocene. Calvert Greenish sandy clay 8% 



Eocene. Nanjemoy Greenish arenaceous clay li/o 



Total 15 



SECTIONS IN THE PAMUNKEY RIVER VALLEY. 



The Nanjemoy formation outcrops along the Pamunkey Eiver in many 

 places although good exposures of the strata are few in number. 



I. Section right bank of Pamunhey River at Newcastle about one mile by 

 road above Newcastle Bridge. 



Feet 

 Pleistocene Coarse yellow sand with small gravel 5 



Eocene. Narijemoy Coarse gray calcareous sandy marl containing 



small pebbles, glauconitic sand grains, and 

 occasional fossiliferous layers. Among the 

 fossil forms observed were Vcnericardia and 

 Ostrea sellaeformis 7 



Concealed 12 



Total 24 



At a spring just west of Newcastle Bridge on Pamunkey Eiver at bend 

 in the river the gray calcareous Nanjemoy marl similar to that at Newcastle 

 outcrops. Above it is a heavy bed of reddish-yellow sand 12 to 15 feet 

 thick. 



About a mile east of Newcastle Bridge on the Eiver Eoad, the Nanje- 

 moy outcrops in the road. It is similar to that at Newcastle and contains 

 similar fossils. Above it, there was found a coarse greensand layer with 

 sharks teeth, bones and gravel at its base. This seems to belong to the 

 Calvert formation and represents material derived from the Nanjemoy and 

 reworked by the ocean waves during Miocene time. 



