UPPER CRETACEOUS. 133

details of this section are given on p. 98. (See, also, Plate III, B,
opposite p. 98.) The Black Creek materials here consist of dark to
black laminated clay with partings and thin layers of fine, micaceous,
slightly glauconitic sand, the whole more or less lignitic. Similar mate-
rial appears in a section at the A. OC. L. Railroad bridge 34 mile below
the preceding. (See section, p. 99.) Here, also, they rest upon the
Patuxent formation. This is the last place at which the Patuxent
formation appears above water level.

At milepost 93 a low-water stage reveals about 3 feet of.laminated,
lignitic sand and clay of the Black Oreek formation. The thin sand
partings contain grains of glauconite.

At milepost 92, 4% mile above Arringtons Bridge, 6 feet of Black
Creek materials similar to the preceding is exposed along the left
bank. They contain lignite, grains of amber, and pyrites. In a lens
of dark clay about 4 feet above the base the following plant species

were collected: :
Araucaria bladenensis Berry.

Araucaria Jeffreyi Berry.
Podozamites sp.
Sequoia Reichenbachi (Gein) Heer.

Associated with the plant remains were a few indeterminable casts
of pelecypod shells. : :

Between the preceding and a point 8752 miles above New Bern there
are occasional exposures of characteristic Black Oreek materials in
most places rising only a few feet above low-water level. At several
places the beds present a slightly more marine aspect than is exhibited
by typical Black Creek materials, as shown by the occurrence of glau-
conite grains in the thin sand layers and partings. At the last-named
point there is a 2-foot exposure of black clay with fine sand lamine
in which the writer collected a few leaf remains associated with poor
casts of Leda, Cardium, ete. (U.S. G. 8. Loc. No. 5350.) The plant
species are as follows:

Araucaria bladenensis Berry.
‘Araucaria Jeffreyi Berry.
Ficus daphnogenoides (Heer) Berry.

A short distance below the preceding Araucaria bladenensis Berry

and a large undetermined leaf were obtained. ;
"Between the last-named locality and the Sarpony Hills, 8314 miles
above New Bern, there are several occurrences of. Black Creek mate-
rials presenting no unusual characters.