98 THE COASTAL PLAIN OF NORTH CAROLINA.

Patuxent formation : Fre,
4. Greenish gray, compact, arkosic, sandy clay, with irregular

lenses of light-drab clay. The dark clay is filled with small
dark particles which under the microscope appear to be par-

tially decomposed marcassite.......- es ce cece eee reece eee 5
5. Coarse, gray, compact arkosic, somewhat argillaceous sand.... 8

Between the preceding locality and the county bridge none but
Black Creek or supposed Black Creek beds are exposed in the river
banks, the Patuxent-Black Creek contact being below water level.

At the county bridge, however, 2 miles southwest. of Goldsboro and
9434 miles above New Bern, right bank, the Patuxent beds again appear
unconformably overlain by beds of the Black Creek formation, as
shown in the following graphic section, Fig. 6. (See, also, Plate IIT, B.)

SE. : NW.

 

Fig. 6.—Sketeh showing the telatton ot the Patuxent peti to the Black

Creek formation, and latter to overlying Pleistocene deposits; Neuse River,
at the county bridge, 2 miles 5 cine of Goldsboro, N. C.

EXPLANATION oF SEcTION.

Paar

{FRc hdee = ule as ina ‘grading down into coarse gravelly sand with gravel band
at base, containing bowlders of crystalline rocks.

2. Black Creek formation.—Dark to black, laminated clay with partings and thin layers of
fine micaceous, slightly glauconitic sand, the whole more or less lignitic and containing rlumer-
ens eomanchiogs of swam aulpliise. The lignite occurs in the form of large and small pieces and
in seams of co1 les _ Fragments of wood remains which resemble charred wood
are present in con

_ fe Patucent, rma

  
 

-Yery compact, drab clay and coarse arkosic micaceous sand,

The last appearance of the Patuxent formation above water level
is at the A. C. 1. RR. bridge % mile below the preceding, where the
following tae. ~ fs ae é

.

ee va is