SECTIONS IN THE JAMES RIVER VALLEY. 165 



^'II. Section at Chucl-aiucl-, just below mill dam. 



Feet 

 Pleistocene Gray and yellow sands with numerous small 



unnel and witli occasional indurated layers 



about 20 



Concealed from view 10 



Miocene. Yorktown Olive gi'een argillaceous marl with some sand, 



carrying only a few fossils, chiefly Pecten, 

 Melina. Cardium, Glycymeris, and Echino- 

 cardiuin orfJioiiotiim 5 



Total 35 



VIII. Section along roadside near Ererefs Creek one-quarter mile cast of 



Everei's Bridge. 



Feet 

 Pleistocene Yellow to gray laminated sand somewhat 



argillaceous in places and containing an 

 almost continuous band of pebbles at base 5 



^Miocene. Yorktown Fine buff to gray sand, blue where unweathered 



( expcsed ) 8 



Total 13 



Farther down the hill near the l)ridge shell marl outcrops beneath 3 feet 

 of yellow sand. The shells, for the most part well preserved, are in a mat- 

 rix of yellow sand. Turritella and Corhula ( ?) are especially abundant. 



IX. Section along roadside just south of Exit Post-Office. 



Feet 

 Pleistocene Hard laminated buff sand with some pebbles at 



base 9 



Miocene. Yorktown Shell marl; fossils, many perfect, contained 



in a matrix composed of fragmental shells 

 and sand, partially indurated at base. This 

 marl has been dug for fertilizing purposes 



( exposed ) 6 



Gap due to concealment by vegetation 5 



St. Clary's .lust below dam. blue sand containing many 

 small Pelecypods, Cadulus, Polynices, etc., 

 ( exposed ) ^> 



Total 26 



At the bridge, there is an exposure of this blue sand about 12 feet thick 

 which contains a considerable variety of entire shells. 



Much marl is found about Western Branch, Nansemond Eiver, near 

 Reid's Ferry. The. shells are in matrix of broken shells much resembling 

 the material at Yorktown. 



