SECTIONS ON THE EAPPAHANNOCK RIVER. 



97 



III. Section right hank of RappahannocJc River, one mile below mouth of 



Massaponax Creole. 



Feet 



Pleistocene Yellow sand and gravel with boulders 8 



Light greenish-gray glaiiconltic sand, prob- 



Eocene. Aquia ably dark green if not weathered 17 



Similar materials full of fossils, CrassatelU- 

 tes alaeformis, Cucullaea gigantea, Ostrea 

 compressirostra, Meretrix ovata var. pyga, 



Turritella morioni, etc 12 



Dark green compact, finely micaceous green- 

 sand 15 



Total 52 



IV. Section left bank of Rappahannock River, one and one-half miles 



below mouth of Massaponax Creek. 



Feet 

 Pleistocene Sand and gravel with boulders 8 



Eocene. Aquia Dark greensand about 20 



Total 28 



V. Section right bank of Rappahannock River three miles beloiu mouth of 



Massaponax Creek. 



Feet 

 Pleistocene Yellow sand and gravel about 10 



Eocene. Aquia Dark greensand more or less argillaceous, 



grading into clay at base. Fossil casts are 

 present in lower 10 feet and especially 

 abundant in lower 5 feet 35 



Total 45 



VI. Section a few hundred yards below preceding section. 



Feet 

 Pleistocene Coarse sand and gravel containing boulders 8 



Fine-grained greenish-gray carbonaceous sand 5 

 Yellow gravel with pebbles up to 3 or 4 

 inches in diameter 5% 



Eocene. Aquia Dark green argillaceous finely micaceous 



sand " 21 



(Irregular contact with offsets of as much 

 as 2 feet suggest an unconformity but may 

 be simply the irregular upper surface of 

 marl lenses). Dark greensand full of fos- 

 sils most of which are very fragile and 

 soft, including Ostrea compressirostra, Tur- 

 ritella mortoni, Meretrix ovata var. pyga ?, 

 Crussatellites alaeformis, Modiolus alab- 

 amensis, Dosiniopsis lenticularis, Crassa- 

 tellites sp 13 



Total 52y2 



