SECTIONS ALONG MATTAPONI RIVER. 99 



About one mile below the mouth of Ware Creek there is a 70-foot bluff 

 on the right bank of the Eappahannock Elver apparently composed mainly 

 of Aquia greensand. 



X. Section on Rappahannock River, Radcliffe's Wharf. 



Feet 



Pleistocene Sand and gravel 14 



Eocene. Aquia Dark green argillaceous greensand. Fossils 



in lower 8 feet Turritella mortoni, Crassa- 

 telUtes alaeformis, Meretrix ovata (?), Os- 

 trea compressirostra, Lunatia marylandica, 

 Modiolus alabamensis, Cucullaea gigantea 

 etc. Turritella mortoni is the most con- 

 spicuous fossil, being present in great 

 numbers 17 



Total 31 



Just above Hopyard Wharf the Aquia formation outcrops for a distance 

 of half a mile or more. It consists mainly of a bluish sandy clay carrying 

 some greensand. Near the base of the cliff in many places the material is 

 indurated, to form nodules 6 to 10 feet long and 2 to 4 feet in diameter 

 that lie flat and project from the bluffs. Both the blue clay and its nodules 

 contain many casts and some shells of Turritella mortoni. Other forms 

 are rare. 



SECTIONS ALONG MATTAPONI RIVER. 



Along the Mattaponi Eiver in Caroline County the Aquia formation 

 is exposed in a few places. It probably forms a continuous bed underlying 

 the valley from a point about three miles north of Milford where there is a 

 poor exposure of dark green glauconitic sand' to a short distance below the 

 crossing of the road which leads from Penola to Shumansville. 



I. Section riglit hank of Mattaponi River, R. F. & P. R. R. bridge, four 



miles south of Milford. 



Feet 



Pleistocene Yellow sand and gravel 10 



Eocene. Aquia Dark colored greensand indurated in places 



to form large concretions and containing 

 Turritella mortoni in large numbers with 

 Meretrix ovata, Modiolus alabamiensis, 

 Crassatellites alaeformis, Ostrea compress- 

 irostra, etc 10 



Total 20 



Between the point where the above section was taken and Milford, Aquia 

 greensand containing fossil casts is poorly exposed in several places. 



