TERTIARY FORMATIONS. 209

SECTION ON ROANOKE RIVER, 5 MILES BELOW

HALIFAX, 1 MILE ABOVE STATE
FARM LANDING.

Pleistocene: Fret:
COneOM OR ne asst vals satd coauee teagan a cogs ie ae 6
Stratified yellow sand, containing pebble FAVORS S 5x0) tee ny oe 17%

Miocene (St. Marys) : :

Dark green compact sandy clay containing a few fossil casts,
grading downward into a greenish-gray argillaceous sand con-
taining a few small pebbles at the base............. pg he 10

Cretaceous (Patuxent) :

Gray micaceous arkosic sand, with some lignite, exposed......... 4

SECTION A FEW HUNDRED YARDS BELOW THE PRECEDING, RIGHT BANK OF

ROANOKE RIVER.
Pleistocene:

Sand and gravel strata alternating, resting unconformably upon
the Miocene ste noe ane eh ene Gon ee 22
Miocene (St. Marys) : ‘
: Dark bluish-green arenaceous clay containing small flakes of mica
and a few fossil casts, resting unconformably upon the Creta-

CEDURE Susie ees Sse os Samia eh Seige Fane ee CUOMO e ee Leen areas 3-314
Cretaceous (Patuxent) :

Coarse, arkosic sand, ESPOSCd esos ah vs tk ol eee eee ate tease 12

FEer.

SECTION ON ROANOKE RIVER, BELOW MUDHOLE LANDING, 10} MILES

; BELOW HALIFAX. :
Pleistocene: Freer.

Poorly exposed gravel band, containing cobbles and bowlders at
[ABE ue meet, oe Spats thare-s als Wisi eo Alec ias Cee ias Aiea are se aeonees 22

Miocene (St. Marys) ;
Stratified gray sandy micaceous clay interlaminated with gray,

yellowish-brown sand, lamine several inches thick............. i
Band of small pebbles not well exposed............. rete 1%

SECTION ON RIGHT BANK OF ROANOKE RIVER, EDWARD'S FERRY,

102} MILEPOST.
Pleistocene:

Poorly exposed strata, gravel band at base; rests unconformably
upon the Miocene.......... se eeee aaeiis eo Tears eh a diy cee a ee

Miocene (St. Marys) : :

Dark bluish-green micaceous plastic clay with a few indistinct fos-
sil imprints and a few small fish vertebre. At the base there
is a thin line of small pebbles containing a few larger ones,
some of which are 2 to 3 inches in diameter. The contact be-
tween this stratum and the underlying Cretaceous sand is an
undulating line varying from 4 to 8 feet above the water, and in
a few places the Miocene is entirely absent. A few fragments

of the Cretaceous materials have been included in the base of
the Miocene ...... te ee Ses werey sa sinas APL Soe ee 0-4

Cretaceous ( Patuxent) :

Light drab micaceons, arkosic sand... 20.2.0. ..c cece cvscseccecs 4-8
14 :

Fert.

a