TERTIARY FORMATIONS, 247

SECTION OF WELL AT ST, HELENA, 2} MILES SOUTH OF BURGAW,
PENDER COUNTY.
Pleistocene: 2 :
Gray ‘clayey 25 cs see aie ay Sa ee ee ee 0-10
Marl, consisting of chunks of dark gray, calcareous, sandy clay,
coarse sand and gravel with pebbles up to %4 inch in diameter
and fragments of fossils, Ostrea, Echinoid spines, ete.cciesvexs 10-20

Miocene (Duplin) :

Yellow marl, consisting of coarse sand and gravel with pebbles
up to % inch in diameter, pieces of yellow limestone rock,
phosphate pebbles up to 14 inch in diameter, chunks of gray
clay, and many fragments of fossils, Venericardia, other Pele-

cypods, Gastropods, Hchinoid spines, etc..............ceceeccee 20-30
Fine, dark greenish-gray micaceous, calcareous, glauconitie sand
» with scattered fragments of fossil@s 25. oi. Sos ee eae aa 30-40

Fine, gray glauconitic sand with phosphate pebbles up to % inch
in diameter, and many shells and fragments of shells, Arca,
Venericardia, Spisula (?), Balanus, Ostrea, Bryozoa, Glycym-

CINE BUC e ae a Cate shee ok Oe bo Ber vee A pe Cot eae ee 40-60
Cretaceous (Peedee) :

Dark gray, finely micaceous, glauconitic sand and sandy clay..... 60-70

Mba] Gentes cp. 5 eles ss su sees eey Sins sea ad owe. o Seite seats ii ROSE ret 220

At Bolton in a well section the Miocene, consisting of light gray,
coarse-grained sand with shell fragments, is 10 feet thick and was
encountered at 40 feet from the surface. It is overlain by Pleistocene
and underlain by Peedee. Three-fourths of a mile southwest of Free-
man, Tertiary (Pliocene (?) and Miocene) strata were encountered
at depth of 15 feet and apparently extended to 146 feet.

In a well 14 mile east of Robeson, Miocene extends from 30 feet to
40 feet—coarse sand and gravel with shell fragments. It contains the
following fossils:

‘ :
GASTROPODA: Corbula inaequalis Say.
Tornatina canaliculata Say. Crassatellites sp.
PELECYPODA :! Glycymeris subovata Say.
Arca sp. ; Ostrea sp.
Asaphis centenaria Conrad. Pecten eboreus Conrad.
Astarte concentrica Conrad. Venericardia sp.

Cardium sublineatum Conrad.

Along the northern shore of Lake Waccamaw the Miocene is exposed

_ continuously for about a mile, extending from the pumping station

eastward. About 14 mile east of the pumping station of the A. O. L.
Railroad the following section is exposed:

Pleistocene: Feer.

Pink and yellow loamy sand or Clay..........seseseeeeeeeeee eee 10-15