SECTIONS ALONG JAMES RIVEE. 101 



IV. Section along river road about four miles southeast of Hanover. 



Feet 



Pleistocene Concealed 6 



Coarse yellow cross-bedded alternating sand 

 and gravel layers with two layers of iron 

 crusts at base between which is a very 

 coarse gravel layer with large boulders of 

 gneiss ( 1 to 2 feet in diameter). From 

 this coarse gravel layer a stream issues . . 7 



Eocene. Aquia Reddish-yellow weathered greensand marl 



with fossil impressions 1 



Dark green, glauconitic, micaceous, sandy 

 clay with a few fossils, a small Vencricar- 

 dia being most abundant 15 



Total 29 



V. Section right hanJc Pamunhey River about seven miles southeast of 

 Hanover Courthouse and two and one-half miles from Studley. 



Feet 

 Pleistocene Yellow sand and gravel 15 



Eocene. Aquia Dark green glauconitic sand, coarse in 



* lower portion and fine in upper, contain 



ing fossil impressions 4 



Layer of small dark-colored gravels, sharks 



teeth and bone fragments 2-3 in. 



Dark green glaiiconitic micaceous sandy 



marl with a few fossils 12 



Concealed 15 



Total 46 3 in. 



A similar section is exposed on the right bank of the Pamunkey Eiver 

 about five miles northeast of Studley. 



SECTIONS ALONG CHICKAHOMINY RIVEE. 



The Aquia formation has not thus far been observed along the Chicka- 

 hominy Elver, but this is undoubtedly due to its being concealed from view 

 by the recent swamp deposits that are so extensively developed in the river 

 valley. 



SECTIONS ALONG JAMES EIVEE. 



The Aquia formation is exposed at a number of localities in the James 

 Elver valley from Eichmond to City Point where it disappears beneath water 

 level. It is by no means continuous between these points as most of the 

 bluffs show Patuxent strata immediately overlain by Pleistocene sands and 

 gravels. Also in one place the Piedmont crystalline rocks come to the 



