116 PHYSIOGRAPHY AXD GEOLOGY OF THE COASTAL PLAIN PROVINCE. 



On the right bank of the James Eiver, two and three-quarters miles 

 below Cit_y Point greensand marl was formerly dug, dried and shipped t& 

 fertilizer factories. The section is about the same as that at the preceding 

 locality. The Eocene greensand is directly overlain by Miocene shell marl 

 and no diatomaceous earth appears. The Pleistocene is thicker, however, 

 and the bluff higher than in the section given above. The marl was dug at 

 this place for about twelve years, but in 1906 a great piece of the bank slid 

 down and crushed the mill and covered up the pits, since which time the 

 plant has been abandoned. 



II. Section right bank of James River, just helow Indian Field Point, six 



miles helow City Point. 



Feet 

 Pleistocene Buff to brown loose sand with a thick bed of 



pebbles near base not well exposed 25 



Bluff concealed hj vegetation and by land- 

 slides 15 



Miocene. Calvert Thin band of Miocene shell marl in buff sand 



matrix, whole layer somewhat disturbed as 

 the result of landslides. Area centenaria 

 was the only perfect fossil observed 3 



Eocene. Nanjemoy . Shell layer, many rotten shells and great num- 

 bers of Ostrea scllaeformis 2 



Glauconitic sand, decidedly argillaceous, mainly 

 concealed by vegatation to water's edge, 

 formerly dug for fertilizing material 30 



Total 75 



x\ll along the river in this section there have been great landslides that 

 have formed a distinct terrace which is now cultivated. The terrace is from 

 25 to 75 yards wide. 



III. Section right hanh of James River at Coggins Point, nine miles below 



City Point. 



Feet 



Pleistocene Coarse sand containing many pebble lenses .... 20 



Pebble and cobble band 10-15 



Eocene. Nanjemoy Clay mottled, exposed 4 



Concealed by vegetation to water 18-20 



Total 59 



