UPPER CRETACEOUS. 159

One mile above Edwards Bridge (which is just on the western edge
of the Ayden quadrangle) the Peedee strata show a slight variation
from the usual lithologic character. The section is as follows:

 

SECTION 1 MILE ABOVE EDWARDS BRIDGE, LEFT BANK.

a Pleistocene: Fert.
ae Loam and sand with thin gravel band at base, rusty brown in
lower: :2' feet... csv Gite sen pee has salen Fae wee ee 6
(Unconformity.)

Cretaceous (Peedee sand) :
Coarse, very green, very glauconitic sand with a mealy texture,
containing the highest percentage of glauconite of any of the

 

  
   
  
 
 
 
 
    
  
 
   
 
  
  
  
   
   
   
  

greensands observed in the State... 2.0.0... 0.3.0. cc ccs ees e eee 4
Layer of concretions of all sizes up to several inches in diameter,
consisting of greensand cemented with lime................... x
i Dark brownish, argillaceous, glauconitic sand.................+. 3

Between here and Edwards Bridge the greensand appears in several
low exposures. Below Edwards Bridge nothing was seen until mile-
post 7 was reached, between which point and Grifton the greensands
and clays of the Peedee appear at a number of places rising not more
than 6 or 7 feet above the water.

At milepost 6, left bank, 114 miles above Grifton, Ostrea subspatulata
Forbes and Ezogyra costala Say were. collected from upper Peedee
beds. (U.S. G. S. Locality No. 4153.)

The most northerly occurrence of the Peedee formation is at Green-
ville, in Pitt County. Although no surface exposures have been seen
by those who have recently worked in that vicinity, the existence of the
_ beds there are known from an account given by Conrad in 1871.1 He
describes the occurrence of the characteristic fossil Belemmnitella ameri-
cana Morton in Oretaceous sand in the bottom of a marl pit beneath
a Miocene shell bed. From this account it is reasonably certain that in
places at least in the vicinity the Peedee beds are present at no great

pth beneath the surface.
South of Cape Fear River valley the Sas surface occurrence of —
Peedee strata known within the State is on the north shore of Wacea-
maw Lake in Columbus County. To the east of the pumping station
of the Atlantic Coast Line Railroad a low bluff is formed by the out-—
erop of an indurated layer of Miocene shell marl or limestone. The
ase of the Miocene is revealed at one place only, which is at the west
d of the bluff near the pumping station. Immediately beneath the
indurated layer there is a loose conglomerate consisting of rounded
bbles and irregular nodules of shape, internal Leona casts ne

Allie Sean. Sci., 3d ser., Yoh. 15 pe A AT