28G: Wayne County Core, Manningtown

28G; WAYNE COUNTY, GEORGIA
Manningtown Core
7½’ Quadrangle

By Paul Huddlestun

The location of the Wayne 2 core is in a remote, rural area, approximately 3.5 miles east of the junction of US 301 and Broadhurst Rd. in southern Wayne County; 0.1 mile east of the highway name-change of Gardi Rd and Manningtown Rd, and Broadhurst Rd/Hazel Lane, on the Penholoway Terrace.

Latitude              N 31° 27.834’
Longitude             W 81° 51.250’
Elev. ~59 Feet

By Paul Huddlestun
Logged – ca. 1973
Written up – 10/13/13

Lithostratigraphic
unit and bed number         Description Thickness     Depth

NO CORE                                                                                    15.0              0.0

UPPER PLIOCENE, PIACENZIAN
CYPRESSHEAD FORMATION – 38 feet+
~91% core recovery

Bed 1          Sand: medium grained and well sorted;                    2.5             15.0
argillaceous; massive and structureless;
unconsolidated and coherent: grades

Bed 2          Sand: fine grained and well sorted (like sugar            7.0            17.5
sand); no other lithic components noted;
unconsolidated and coherent; white (N 9) in
color; overlies core gap:

CORE GAP 5.5             24.5

Bed 3          Sand: fine grained and well sorted; slightly               4.5             30.0
argillaceous with a few scattered discontinuous
laminae of clay; thinly layered; unconsolidated,
coherent and apparently competent; grades downward into:

Bed 4          Gravel: pebbly and coarsely sandy, poorly                1.5             34.5
sorted; somewhat argillaceous with interstitial
clay; massive and structureless; unconsolidated
but coherent and apparently competent; grades
downward into:

Bed 5          Sand: fine grained and well sorted; slightly              17.5             36.0
argillaceous, with scattered, discontinuous
clay laminae in basal 1 foot; no other lithic
components noted; mostly massive and
structureless; unconsolidated, probably at
least moderately coherent and competent in
the upper part of the Bed and poorly
coherent to incoherent in the lower part,
moderately competent (~65% core recovery);
grades abruptly downward into:

Raysor Member? – 6 feet

Bed 6           Clay: (probably continuous or discontinuous             5.5             53.5
(6 other Raysor beds or the Duplin Formation
farther seaward); very finely sandy with
scattered fine sand laminae or layers, some
pelletal phosphate noted; the clay appears to
be massive and structureless but the presence
of fine sand stringers or laminae suggest that
the Bed is subtlely layered; coherent to
competent (100% core recovery);
disconformably overlies:

UPPER MIOCENE, TORTONIAN
HAWTHORNE GROUP – 564 feet
EBENEZER FORMATION – 211 feet
~65% core recovery

Bed 7           Sandstone: (probably hard ground); no other            1.0             59.0
lithic component noted, cementing agent
unknown; massive and structureless;
indurated; competent; overlies:
Bed 8 Sand caving? 4.0             60.0

Bed 9 Sand: fine to medium grained and somewhat 16.0             64.0
argillaceous, more argillaceous in the upper
2 feet of the Bed, slightly phosphatic with
pelletal phosphate and slightly dolomitic, both
in the basal few feet of the Bed: massive and
structureless; unconsolidated and moderately
  coherent and competent (~62% core recovery);
  grades downward into:
Bed 10 Sand: fine grained and well sorted; slightly             25.0             80.0
argillaceous with minor interstitial clay and
scattered continuous and discontinuous clay
laminae; slightly phosphatic below 90 feet;
slightly dolomitic and a trace of calcite
below 91 feet based on HCl reaction; thinly
layered; unconsolidated and moderate
coherence and competence, upper part of
the Bed is less coherent and competent
than the lower part (~67% core recovery);
grades downward into:

Bed 11 Sand: fine to medium grained and well sorted;       41.0            105.0
variably and somewhat argillaceous; sparingly
phosphatic and a trace of dolomite; massive
and structureless; unconsolidated and
variably moderate to fully coherent and
competent (an average of ~78% core
recovery); grades downward by coarsening
into:

Bed 12 Sand: variably medium to coarse grained and         7.0            146.0
moderately to poorly sorted; somewhat
argillaceous with phosphate pellets (pelletal
phosphate and coarseness/poor sorting are
apparently inversely related); mostly massive
and structureless except for some thick, very
rude stratification; unconsolidated but
coherent and competent (100% core recovery;
grades abruptly downward into:
Bed 13 Sand: fine grained and well sorted; 9.0            153.0
conspicuously argillaceous and somewhat
phosphatic; massive and structureless;
unconsolidated but coherent and competent
(100% core recovery); grades downwards
downward into:

Bed 14 Sand: fine to medium grained and well sorted;         8.0            162.0
argillaceous, a trace of pelletal phosphate and
very minor dolomite; massive and
structureless; unconsolidated and probably
coherent and competent; grades downward
into:

Bed 15 Sand: medium to coarse grained and                        2.5            170.0
moderately to poorly sorted; argillaceous and
somewhat phosphatic; massive and
structureless; unconsolidated and coherent;
overlies core gap:

CORE GAP

Bed 16 Sand: medium grained and moderately                  12.0            177.0
sorted with scattered granules and pebbles;
interstitial clay and slightly phosphatic and
dolomitic; massive and structureless;
unconsolidated but most coherent and
competent (~75% core recovery); grades
downward into:

Bed 17 Sand: coarse grained and poorly sorted with           11.0            189.0
an increase in granules and pebbles;
argillaceous with conspicuous clay matrix
and a stringer of dolostone intraclasts at the
top of the Bed; massive and structureless;
unconsolidated and moderately coherent
and competent (~68% core recovery); grades
downward into:

Bed 18 Sand: coarse grained, granully, pebbly and 6.0            200.0
poorly sorted; clay component is not noticeable;
massive and structureless; unconsolidated,
loose and poorly coherent and competent
(~30% core recovery in the interval; abruptly
overlies:

Bed 19        Dolostone: fine textured with a few mollusk             0.5            206.0
molds; probably minor clay content; massive
bedded; appears to be variable in thickness
across the core; recrystallized and
competent; abruptly overlies:

Bed 20        Sand: coarse grained, pebbly and poorly                  3.5            206.5
sorted; feldspathic (fresh feldspar);
argillaceous and with scattered echinoid
fragments; massive and structureless;
unconsolidated but coherent and competent;
grades downward into:

Bed 21        Sand: medium to coarse grained and                       5.0            210.0
moderately/poorly sorted with scattered
quartz pebbles; variably argillaceous with
interstitial clay content decreasing downward;
massive and structureless; unconsolidated
and moderately to mostly coherent and
competent (~83% core recovery); abruptly
overlies:

Bed 22        Dolostone: fine textured and argillaceous,                0.5            215.0
other lithic components noted; massive
and structureless; recrystallized and
competent; abruptly overlies:
Bed 23        Sand: similar to Bed 21 but consistently                  5.5            215.5
little interstitial clay; grades downward into:
Bed 24        Sand: coarse grained, pebbly and poorly                  4.0            221.0
sorted; conspicuously argillaceous; massive
and structureless; unconsolidated and
moderately to mostly coherent and
competent (~83% core recovery); grades
downward into:

Bed 25        Sand: medium to coarse grained, scattered            17.0            225.0
pebbles and moderately poorly sorted;
moderately argillaceous; massive and
structureless; unconsolidated and
moderately coherent and competent (~47%
core recovery); grades downward into:
Bed 26        Sand: poorly sorted, mostly as above but                  7.5            242.0
with some scattered phosphate pellets;
massive and structureless; unconsolidated
and mostly coherent and competent (~80%
core recovery); overlies core gap:
CORE GAP 7.5            249.5

NO CORE RECOVERY   “cuttings” 13.0            257.0

MIDDLE MIOCENE, SERRAVALLIAN
HAWTHORNE GROUP
COOSAWHATCHIE CLAY – 37 feet
~49% core recovery

Bed 27        Sand: argillaceous; massive and structureless;         3.0            270.0
unconsolidated and moderately coherent and
competent; grades downward into:
Bed 28        Clay: variably finely sandy with varying 10.0            273.0
amounts of pelletal phosphate; massive and
structureless; unconsolidated and moderately
coherent and competent; grades downward
into:

Bed 29        Sand: fine grained and well sorted;                           5.0            283.0
argillaceous, no apparent pelletal phosphate;
massive and structureless; unconsolidated
and moderately coherent and competent;
grades broadly downward into:

Bed 30        Sand: coarse grained, pebbly and poorly                   2.0            288.0
sorted; argillaceous; massive and
structureless; unconsolidated but mostly
coherent and competent; abruptly overlies:

Bed 31        Clay: finely and sparingly sandy, 5.0            290.0
nonphosphatic; massive and structureless;
unconsolidated but probably competent;
grades broadly downward into:

Bed 32        Sand: fine grained and well sorted;                           3.5            295.0
argillaceous, nonphosphatic; massive and
structureless; unconsolidated and moderately
coherent and competent; overlies core gap:

CORE GAP 8.5            298.5

LOWER MIOCENE, BURDIGALIAN
HAWTHORNE GROUP
MARKS HEAD FORMATION - 148 feet
~27% core recovery

Bed 33        Clay: appears to be fullers earth; finely                     0.5           307.0
sandy; thinly stratified; unconsolidated but
probably poorly coherent (% recovery is
unknown due to overlying core gap);
abruptly overlies:

Bed 34        Dolostone: fine textured and moldic with                  1.0            307.5
scattered molds of mollusks, finely sandy
and somewhat argillaceous; massive bedded
but with uneven upper and lower surfaces;
indurated; abruptly overlies:

Bed 35        Sand: coarse grained, gravelly and poorly                1.5            308.5
sorted; slightly argillaceous and dolomitic,
nonphosphatic but a shark’s tooth was
noted; massive and structureless;
unconsolidated and probably very poorly
coherent; % core recovery of the Bed is
unknown due to the underlying core gap;
overlies core gap:

CORE GAP 17.0            310.0

CORE GAP            “sand cuttings” 23.0            327.0

Bed 36        Sand: medium to coarse, gravelly and poorly           4.0            350.0
sorted; argillaceous with clay content
increasing downward, somewhat dolomitic,
some burrows noted; massive bedded;
unconsolidated and moderately coherent but
of unknown competence and thickness;
overlies core gap:

CORE GAP 6.0            354.0

Bed 37        Dolostone: finely sandy and phosphatic;                  0.5            360.0
massive bedded; recrystallized and competent
abruptly overlies:

Bed 38        Clay: finely sandy and dolomitic; massive and          2.5            360.5
structureless; unconsolidated and apparently
coherent and competent; abruptly overlies:
Bed 39        Dolostone: finely sandy and phosphatic with            1.5            363.0
a trace of clay minerals; massive and
structureless; recrystallized and competent;
grades downward into:

Bed 40        Sand: medium grained, a few quartz pebbles            1.5            364.5
and moderately/poorly sorted; massive and
structureless; unconsolidated and probably
poorly coherent and competent; overlies core
gap:

CORE GAP 9.0            366.0

Bed 41        Dolostone: similar to Bed 39 – very and finely           3.5            375.0
sandy and somewhat phosphatic with a trace
of clay minerals; massive and structureless;
recrystallized and competent; grades
downward into:

Bed 42        Dolostone; similar to overlying bed but                    3.0            378.5
prominently with intraclastic dolostone,
dolostone intraclasts decrease in number
downward; massive and structureless;
recrystallized and apparently competent;
abruptly overlies:

Bed 43        Sand: fine grained and well sorted; somewhat        30.5            381.5
argillaceous and phosphatic; massive and
structureless; unconsolidated and poorly
coherent and competent (~23% core recovery);
grades downward into:

Bed 44        Clay: (fullers earth?), slightly silty; massive              3.0            412.0
and structureless; unconsolidated and appears
competent; grades downward into:
Bed 45        Sand; fine grained and well sorted; 4.0            415.0
argillaceous with minor interstitial clay with
thin layers and discontinuous laminae of clay;
somewhat phosphatic; stratified;
unconsolidated and probably poorly
coherent and competent; overlies core gap:
CORE GAP 16.0            419.0

Bed 46        Sand: (marly), fine grained and well sorted;              1.0            435.0
argillaceous and dolomitic with pelletal
phosphate; massive and structureless;
unconsolidated but of unknown coherence
and competence due to overlying core gap;
abruptly overlies:

Bed 47        Sand: fine to medium grained and well                    2.0            436.0
sorted; no other lithic components noted;
unconsolidated but of unknown coherence
and competence; overlies

Bed 48        Clay: (marly), similar to Bed 46 but less                   3.0            438.0
sandy; dolomitic with pelletal
phosphate; massive and structureless;
unconsolidated but of unknown coherence
and competence due to underlying core gap;
overlies core gap:

CORE GAP 14.0            441.0

LOWER MIOCENE, AQUITANIAN
HAWTHORNE GROUP
PARACHUCLA FORMATION – 168 feet
Porters Landing Member (upper Parachucla) – 67.5 feet
~30% core recovery

Bed 49        Clay: (Porters Landing-type clay); somewhat             6.0            455.0
sandy and phosphatic; massive and
structureless; tough and competent; overlies
core gap:

CORE GAP 12.0            461.0

Bed 50        Sand: fine/medium grained and well sorted, 3.5            473.0
fines downward; slightly argillaceous in the
upper part with clay content increasing
downward; somewhat phosphatic; massive
bedded; unconsolidated and of unknown
competence; abruptly overlies:
Bed 51        Dolostone: finely sandy and fine textured, no 0.25            476.5
other lithic components noted; structureless;
crystallized and probably competent; abruptly
overlies:

Bed 52        Sand: recovered sand is fine grained and 20.75           476.75
well sorted, no other lithic components
noted; appears massive and structureless;
unconsolidated and very poorly coherent
and competent (~10% core recovery – can’t
be certain if it is all the same Bed); abruptly
overlies:

Bed 53        Dolostone: finely sandy and fine textured,               0.5           497.5
somewhat phosphatic with pelletal phosphate;
structureless; crystallized and competent;
overlies core gap:

Bed 54        Sand: mostly fine grained and well sorted;               20.5          498.0
  argillaceous and somewhat phosphatic and
dolomitic; massive and structureless;
unconsolidated and probably poorly coherent
and competent (~22% core recovery); grades
downward into:

Bed 55        Sand: broadly similar to the overlying bed                4.0            518.5
but is finely carbonaceous with interstitial
carbonaceous material and there is no
apparent dolomite or pelletal phosphate;
massive and structureless; unconsolidated
but apparently coherent and competent;
very abruptly and probably disconformably
overlies:
LOWER MIOCENE, AQUITANIAN
HAWTHORNE GROUP
PARACHUCLA FORMATION
Tiger Leap Member (lower Parachucla) – 119.5 feet
~52% core recovery

Bed 56        Dolostone: somewhat fossiliferous with                    3.0            522.5
mollusk molds; a trace of pelletal phosphate;
massive and structureless; recrystallized and
competent; grades abruptly downward into:

Bed 57        Limestone: fossiliferous with molds of                       5.5            525.5
mollusks; no other lithic components noted;
massive and structureless; partially cemented
and probably competent; overlies core gap:
CORE GAP 4.0            531.0

Bed 58        Sand: argillaceous and pigmented; may be               4.0            535.0
cuttings or slump from the higher, weathered
section; overlies core gap:
CORE GAP 6.0            539.0

Bed 59        Sandstone: the quartz sand is well sorted and          7.5            545.0
very calcareous; no other lithic components
noted; massive and structureless; cemented
with calcite but the competence is unknown
due to a core gap; overlies core gap:

CORE GAP                                                                                14.5            552.5

Bed 60        Sand: fine grained and well sorted;                        36.0            567.0
argillaceous, dolomitic and phosphatic with
pelletal phosphate – more phosphatic in the
lower few feet; massive and structureless;
unconsolidated and moderately coherent and
competent (~54% core recovery); grades
downward into:

Bed 61        Dolostone: “Penney Farms” lithology,                     20.0           603.0
fine to medium textured sucrosic dolostone;
finely sandy and phosphatic with both pelletal
phosphate and phosphatic nodules; probably
a trace of clay minerals are present but clay is
not apparent; massive and structureless;
recrystallized and moderately well competent
(~70% core recovery); abruptly overlies:

Lower Oligocene, Vicksburgian?
Lazaretto Creek?
~47% core recovery

Bed 62        Limestone: very sandy, quartz sand is fine             19.0            623.0
to medium grained and well sorted;
fossiliferous with common to abundant
mollusk molds; cf. Pararotalia mexicana was
noted near the base of the Bed; massive and
structureless; well cemented with calcite and
moderately competent (~42% core recovery);
very abruptly overlies:

LOWER OLIGOCENE, VICKSBURGIAN
SUWANNEE LIMESTONE – 45 feet±
~33% core recovery

Bed 63        Limestone: granular and non-macro-                        3.0            642.0
fossiliferous; cf. Pararotalia mexicana was
noted near the top of the Bed; massive and
structureless; poorly indurated, partially
cemented with calcite; grades downward into:

Bed 64        Limestone: similar to the overlying bed but 20.0            645.0
the limestone is well cemented; massive and
structureless; the competence of the lithology
is uncertain due to a core gap from 648 feet to
650 feet; mostly indurated but moderate
to poor core recovery (~40% core recovery);
overlies core gap:

CORE GAP 5.0            665.0

Bed 65        Limestone: granular and coarsely fossiliferous          4.0            670.0
with molds of mollusks; mostly massive bedded
but there is a layer 1 foot thick of poorly
cemented, non-macrofossiliferous limestone
within the Bed; well cemented but the
competence of the limestone is uncertain:
overlies core gap:

CORE GAP 13.0           674.0

BOTTOM OF THE CORE AT 687 FEET.                     ___________________________
                                                                                    TOTAL DEPTH – 687 FEET
       9/29/23