Illustrations of 

Plant Microfossils 

From the Yazoo Clay 

(Jackson Group, Upper Eocene) 

Mississippi

GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E
Illustrations of 

Plant Microfossils 

From the Yazoo Clay 

(Jackson Group, Upper Eocene) 

Mississippi

By ROBERT H. TSCHUDY and SHARON D. VAN LOENEN

CONTRIBUTIONS TO PALEONTOLOGY

GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E

An assemblage of Yazoo Clay palynomorphs is 

illustrated and discussed briefly; tentative 

taxonomic identifications are made 

to the generic level

UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1970
UNITED STATES DEPARTMENT OF THE INTERIOR 

WALTER J. HICKEL, Secretary

GEOLOGICAL SURVEY 

William T. Pecora, Director

For sale by the Superintendent of Documents, U.S. Government Printing Office 

Washington, D.C. 20402 - Price 50 cents (paper cover)
CONTENTS

Page

Abstract ________________--__-______--____-_-__--__ El

Introduction. ______________________________________ 1

Source of material-_________________________________ 1

Age and stratigraphic position of samples ______________ 1

The Yazoo pollen and spore assemblage-______________ 2

References,________________________________________ 2

Index ____-_____-__________--_-_-_____----__-___-_- 5

ILLUSTRATIONS

[Plates follow index]

Page

PLATES 1-5. Yazoo pollen and spores. 

FIGURE 1. Index map showing sample localities____-__--____-_-----.______-__ E2

in

CONTRIBUTIONS TO PALEONTOLOGY

ILLUSTRATIONS OF PLANT MIGROFOSSILS FROM THE YAZOO CLAY (JACKSON GROUP,

UPPER EOCENE), MISSISSIPPI

By ROBERT H. TSCHTIDY and SHARON D. VAN LOENEN

ABSTRACT

This publication illustrates a pollen and spore assemblage 

from the marine Yazoo Clay of Mississippi. The late Eocene age 

of the formation is well established by mollusks and Foraminifera. Figures on each plate are supplied with provisional generic 

identification. Many of the species have not previously been 

illustrated.

INTRODUCTION

U.S. Geological Survey palynologists have accumulated many palynological assemblages of diverse ages 

from type or well-documented sample localities. We 

anticipate that this material eventually will be the subject of detailed taxonomic treatment. The present publication is intended as a means of presenting some of 

these data in a condensed, preliminary form.

The usefulness of palynological assemblages for 

stratigraphic determinations and for laboratory reference has been amply demonstrated in a series of papers 

published by the Canadian Geological Survey, as listed 

by Barss (1967). These assemblages serve to make information immediately available that would otherwise be 

unavailable until such time as a full systematic treatment could be accomplished. This publication, like the 

papers of the Canadian Geological Survey, is designed 

primarily for laboratory reference and is in no way 

intended as a substitute for thorough taxonomic treatment. It is a tentative guide to the preliminary identification of the more common species present in the 

assemblage. No attempt was made to record all the 

rare species that were present in the material.

SOURCE OF MATERIAL

The Yazoo Clay, named from exposures in the bluff 

of the Yazoo River at Yazoo City, Miss., is a marine 

unit consisting of blue-green to blue-gray calcareous, 

glauconitic, fossiliferous, silty clay and clay. It has an 

average thickness of about 450 feet and attains a maximum thickness of about 525 feet in southwestern Hinds

Comity, Miss. (Moore, 1965). The Yazoo outcrop belt 

forms what is known as the Jackson Prairie in Mississippi. It also crops out in Alabama and Louisiana. 

Priddy (1960) stated: "Despite the broad belt of outcrops of the Yazoo Formation, good exposures of the 

Yazoo Clay are rare/1 We were fortunate in obtaining 

good sample material from the following localities:

Core hole at the type locality, SE^SW^SE^i sec. 

32, T. 12 N., R. 2 W., Yazoo County, Miss.

Core depth 64 feet, USGS Paleobotanical locality

D3697-B.

Core depth 140 feet, USGS Paleobotanical locality

D3697-A. (See Moore and others, 1964, p. 13.)

Core hole AF tO, 25 feet north of east-west gravel

road in SW^SE^NWi/4 sec. 5, T. 7 N., R. 1 W., Hinds

County, Miss.

Core depth 26 feet, USGS Paleobotanical locality

D3698-B. 

Core depth 44 feet, USGS Paleobotanical locality

D3698-A.

The above samples were supplied through the courtesy 

of the Mississippi Geological Survey.

Jackson Ready-Mix Concrete-Light Aggregate 

Quarry, SW^NE^NE^ sec. 36, T. 7 N., R. 1 W., 

Hinds County, 7 miles west-southwest of Madison, Miss. 

(Priddy, I960, p. 40, and Moore, 1965, pi. 1).

Surface sample 10 feet below top, USGS Paleobotanical locality D3699-B.

Surface sample 30 feet below top, USGS Paleobotanical locality D3699-A. 

The location of these samples is shown in figure 1.

AGE AND STRATIGRAPHIC POSITION OF THE 

SAMPLES

The Jackson Group in Mississippi consists of the 

Moodys Branch Formation and the overlying Yazoo 

Clay. The Jackson Group was first differentiated from 

other Eocene rocks by Conrad (1855), who also deEl
E2 CONTRIBUTIONS TO PALEONTOLOGY

scribed the molluscan fossils. Harris and Palmer 

(19-15), in a monograph on the Jackson mollusks, provided additional data, which support a late Eocene age 

for the Jackson Group. Foraminiferal and ostracode 

microfossil evidence also supports a late Eocene age for 

the Yazoo Clay and its equivalents (Deboo, 1965). Apparently there is no question concerning the age of this 

unit.

The Yazoo Clay, according to Mellen (1940), conformably overlies the Moodys Branch Formation and 

conformably underlies the Forest Hill Sand. The Forest Hill is of Oligocene age; however, Prickly (1960) 

stated: "* * * the Yazoo-Forest Hill contact is definitely recognizable in a few places but indefinite in most. 

There can be no doubt as to the disconformable relation 

in Test Holes 7 and 8 where non-marine strata overlie 

calcareous marine clays. However, on the surface the 

contact is difficult to find where (1) non-marine Forest 

Hill clays lie on Yazoo Clays which had been leached 

before Forest Hill deposition, and (2) where aprons of 

rain-washed Forest Hill sands or silts hide the contact

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FIGURE 1. Index map showing sample localities in Yazoo 

and Hinds Counties, Miss.

in gullied areas." The conformable-gradational Moodys 

Branch-Yazoo contact was also indicated by Moore 

(1965).

The stratigraphic position of the samples is summarized as follows:

D3697-A ______________ 48 feet above base.

B __________-_ 124 feet above base.

D3698-A ________ 18 feet belov top.

B _____________- Top.

D3699-A ______________ 30 feet below top.

B ______________ 10 feet below top.

THE YAZOO POLLEN AND SPORE ASSEMBLAGE

Pollen and spore species found in the Yazoo material 

are shown on plates 1-5. Samples D369T-B and D3699- 

A yielded the most diverse assemblages and the best preserved specimens; consequently, most of the photographed specimens are from these two samples. All the 

Yazoo samples yielded abundant marine hystrichospheres and diiionagellates. These, however, are not 

included on the plates.

The generic identifications given in the plate descriptions are believed to be reliable but are subject to 

the constant revision that palynological nomenclature 

is undergoing at present. With few exceptions, no 

attempt is made to indicate species.

The plate descriptions include the locality number 

and a number in parentheses. The latter is the number 

of the slide on which that particular specimen is found. 

The slides and the microscope coordinates for each of 

the photographed specimens are on file in the USGS 

Denver Palynological Laboratory.

REFERENCES

Anderson, R. Y., I960, Cretaceous-Tertiary palynology, eastern 

side of the San Juan Basin, New Mexico: New Mexico Bur. 

Mines and Mineral Resources Mem. 6, 58 p.

Barss, M. S., 1967, Illustrations of Canadian fossils Carboniferous and Permian spores of Canada: Canada Geol. Survey Paper 67-11,94 p.

Conrad, T. A., 1855, Observations on the Eocere deposit of 

Jackson, Mississippi, with descriptions of thirty-four new 

species of shells and corals: Acad. Nat. Sci. Philadelphia 

Proc. 7, p. 257-263 (reprinted, 1939, Am. Paleontology, v. 

24, no. 86,19p.).

Deboo, P. B., 1965, Biostratigraphic correlation of the type Shubuta Member of the Yazoo Clay and Red Bluff Clay with 

their equivalents in southwestern Alabama: A labama Geol. 

Survey Bull. 80, 84 p.

Engelhardt, D. W., 1964, Plant microfossils fron the Eocene 

Cockfiekl Formation, Hinds County, Mississippi: Mississippi Geol. Econ. and Topog. Survey Bull. 104, p. 65-95.

Harris, G. D., and Palmer, K. V., 1946-47, The Mollusca of the 

Jackson Eocene of the Mississippi Embayment {Sabine River to the Alabama River) : Bull. Am. Paleontology, v. 30, 

no. 117, pt. 1, Bivales, 206 p.; pt. 2, Univalves p. 207-563.
PLANT MICROFOSSILS FROM YAZOO CLAY E3

Kedves, Miklos, 1960. Etudes palynologiques dans le bassin de 

Dorog: Pollen et Spores, v. 2, no. 1, p. 89-118.

Mellen, F. F., 1940, Yazoo County mineral resources: Mississippi State Geol. Survey Bull. 39, 132 p.

Moore, W. H., 1965, Hinds County geology: Mississippi Geol. 

Econ. and Topog. Survey Bull. 105, p. 21-145.

Moore, W. H., Parks, W. S., and Kern, M. K., 1964, Type localities sampling program: Mississippi Geol. Econ. and Topog. 

Survey Bull. 104, p. 7-32.

Potonie. Robert, 1934, Zuv Mikrobotanik der Kohlen und ihrer 

Yerwandten, II, Zur Mikrobotanik des eocanen Huniodils 

des Geiseltals: Preuss. Geol. Landesanstalt, Inst. Palaeobot. 

und Petrograpbie Brennsteine, Arb., v. 4, p. 25-125.

Potonie, Robert, Thomson, P. W., and Thiergart, Friedrich, 

1951, Zur Nomenklatur uncl Klassifikation der neogenen 

Sporomorphae (Pollen und Sporen) : Geol. Jahrb., v. 65, p. 

35-69.

Pricldy, R. R., 1960, Madison County geology: Mississippi State 

Geol. Survey Bull. 88,123 p.

Raatz, G. V., 1937, Mikrobotanisch-stratigrapbiscbe TJntersucliung der Braunkohle des muskauer Bogens: Preuss. Geol. 

Landesanstalt, Abh., Neue Folge, 183, 48 p.

Steeves, M. W., and Barghoorn, E. S., 1959, The pollen of 

EijJicdra : Harvard Univ., Arnold Arboretum Jour., v. 40, 

no. 3, p. 221-255.

Stover, L. E., Elsik, W. C., and Fairchild, W. W., 1966. New 

genera and species of early Tertiary palynomorphs from 

Gulf Coast: Kansas Univ. Paleont. Contr., Paper 5, p. 1-11.

Thomson, P. W., and Pflug, Hans, 1953, Pollen und Sporen des 

niitteleuropaischen Tertiars: Palaeontographica, sec. B., v. 

94. 138 p.

Tsukada, Matsuo, 1964, Pollen morphology and identifier tion 

III Modern and fossil tropical pollen with emphasis on 

Bombacaceae: Pollen et Spores, v. 6, no. 2, p. 393 462.

Wolff, Herbert, 1934, Mikrofossilien des pliocanen Humodils 

der Grube Freigericht bei Dettlingen a. M. und Vergleich 

mit alteren Schichten des Tertiars sowie posttertiiiren Ablagerungeii: Preuss. Geol. Landesanstalt, Inst. Palaeobot. 

und Petrographie Brennsteine, Arb., v, 5, p. 55-86.

INDEX

[Italic numbers indicate major references]

Abietineaepollenites......---- - ---- ----- .-____________.____ pi. 2

sp- pi. 2

Age and stratigraphic position of the samples.-----__-_-_----_._.______-___.__ Ei

Alnipollenites verus.......... ---........................................... pi. 3

sp. pl..3

Alnus sp __---------_-_-_-...__------._-_---_._._.-._..----------------- pi. 3

Anacardiaceae_--------------_--_-_______________._-_______-____..__.._...-. pi. 4

Araliaceoipottenites_------------------._______________________________....... pi.4

Araucariacites sp. l----------.-----------____.___________..._._..___________._ pi. 2

Betulaceoipollenitessp......-_--__________-_....._...........__......... pi. 3

Bombacacidites sp............................................................. pi. 5

Caprifoliaceae-..---------_.........................._...._............. pi. 4

Carya sp._._....._...---........--............---.-.-____........... pi. 3

Caryapollenites simplex ...-----..--.--------..-.--...----.................... pi. 3

sp-._ pl. 	3

confossus, Monulcipollenites................................................... pi. 2

coryloides, Momipites.......................................................... pi. 2

Cupaneidites sp............................................................... pi. 4

Cupuliferoipollenttes sp....................................................... pi. 4

Cyathidites sp................................................................. pi. 1

dilatus, Triatriopollenites...................................................... pi. 3

Duplopollis sp.-- - -- ------._ --------_________ pi. 4

Engelhardtioditesmicrocoryphaeus..... ......................................... pi. 3

sp.---._--__----__--_ - _-_ -.---- ._.___ ___________________ pi. 3

Ephedra sp................................................................... pi. 1

Forest Hill Sand. E2

Gleicheniidites sp -------------------------------------------__------------- pi. 1

Granulatisparties.............................................................. pi. 1

hiatus, Inaperturopollenites.................................................... pi. 2

Ilejcpollenites sp.............................................................. pi. 4

Inaperturopollenites hiatus..................................................... pi. 2

Jackson Prairie-....-------.---..--.----..---..---..--------....-..-.-........ El

Juglanspollenites sp ------------------------------------------------_----- pi. 3

Laevigatosporitessp.----...................................................... pi. 1

£SmcW«e*sp--. -------_-----__.-.--.--.-- ....___-_.---.......-. pi. 1

Lonicera...................................................................... pi. 4

marcodurensis, Tricolporopollenites............................................ pi. 5

microcoryphaeus, Engelhardtiodites............................................. pi. 3

Microfoveolatos ports pseudodentatus............................................ pi. 1

Momipites..................................................................... pi. 3

coryloides................................................................. pi. 2

sp.... .......... ......-. ......--.......- .................. pi. 2

Page

Monacal popollenites nupharoides ............................................... pi. 2

Monositlcites sp.. ............................................................. pi. 1

Monutcipollenites confossus........................... ......................... pi. 2

Moodys Branch Formation.. _ ____________________-____.-----_______---_____ El

MultiporopoUenites sp... ...................................................... pi. 3

Nothofagus sp _ ........................... __ ......-.--------...----........ pi. 3

nupharoides, Monocolpopottenites. ............................................. pi. 2

Nympliaeaceae..... _--____.___-_______.-__________.-_--------..---------..--. pi. 2

Osmundaddites.... .................................. .... ..................... pi. 1

Paliurus triplicatus.. ......................................................... pi. 3

Parthetwcissus... ........................ .... ... ------------------------------ pi. 5

plicatus, Triatriopollenites... ......................................... ... ...... pi. 3

Pollenites ventosus.. .......................................................... pi. 4

Polyporopollenites sp _ ......--....---.---.....-.-...---------..--------.-.-.- pi. 3

pseudodentatus, Microfoveolatosporis. ... ........................................ pi. 1

Rhoipites sp. .............. ------------------------------------------------- pi- 4, 5

Sapotaceoidaepollenites sp. ...---....-----...--------.--.-----.---------------- pi. 5

simplex, Caryapollenites-.--.---...-..-----.---------.-------...-----------.--- pi. 3

Source of material. .. _ ----------------------------------- .._----.--._---. E^

SpoJidias ..... --------- _ ----- _ - _ .-..-......--_--------------__----------- pi. 4

Stratigraphic position and age of the samples. -------------------------------- E.7

Symplocoipollenites sp. _ .------.-------- ---.----.---- .-.----.-.--.-. pi. 5

Tillaepollenii.es sp _ --..----.----....--- .-..--.. --------- .---..__ pi. 5

Triangular spore _ ...-.--....-.......-.-....--. ..-----.--.----.-- --..- pi. 1

Triatriopollenites dilatus .... .................................. ... -------------- pi. 3

plicatus .... ....-----.-----..--......... ... -------------------------------- pi. 3

sp.._ - -- pl-3

Tricolpopollenites sp. .......-.---..-.--. _ ..._-----.-__-.-------------------- pi. 4

Tricolporites sp... _ .......---...-..--.-.-.------.--------.-------- -- pi' 4, 5

Tricolporopollenites marcodurensis. ................--...-....-..-.--..-.-...-.- pi- 5

triplicatus, Paliurus .... .....................................-.....- .......-- pi. 3

Triporate pollen.. ------------------------------------------------------------ pi- 2

Triporopollenites sp.....--.......--.----.-...------.--------.------- ----- pis. 2, 3

Trivestibulopollenites sp. ................................... --- -------- ----- pi. 3

Ulmipollenites undulosus . ............................................ ....... pi- 3

sp..... _ _-_..-.-.---_---_--.-_--------_----------------------------- - pl-3

undulosus, Ulmipollenites...........................----.--..-.---..--------.- pi. 3

rentosus, Pollenites ... ....................................................... pi- 4

Verrucatosporites sp........ .-.-......- ... ----------------------------------- pi. 1

Vitaceae.- _ -------- _ _- _ ------- __ .......-..-. ..--..-.-...-.-- ..- pi. 5

Yazoo pollen and spore assemblage.

Eo

PLATES 1-5
PLATE 1

[Magnification X 1,000 unless otherwise indicated]

Locality and slide Nos.

FIGURE 1. Laevigatosporites sp--___________-_-_-__-.___-._________-____ D3699-A (3)

2. Verrucatosporites sp__-_-____-___-____-____________----____ D3697-B (1)

3. Microfoveolatosporis cf. M. pseudodentatus Engelhardt 1964:____ D3699-A (3)

4. Verrucatosporites sp_____________________________________ D3697-B (1)

5. Verrucatosporites sp__-__________-___-_______________--.-_- D3699-A (4)

6. Verrucatosporites sp_____________________________________ D3699-A (3)

7. Cyathidites sp ----------------------------------------- D3699-A (3)

8a. Osmundacidites, high focus showing laesurae_________________ D3697-B (1)

8b. Same specimen, low focus.

9. Monosulcites sp_--_--_____--____-_-----_-----_----------_ D3699-A (1)

10. Monosulcites sp.----.------------------------------------ D3699-A (3)

11. Gleicheniidites sp_______________________________________ D3699-A (1)

12. Triangular spore of Granulatisporites type.. ----------------- D3699-A (4)

13. Ephedra sp. (type A of Steeves and Barghoorn 1959)__---__-_ D3697-B (1)

14. Monosulcites sp. (probably same sp. as fig. 10)_______________ D3697-B (1)

15. Monosulcites sp --------------------------------------- D3699-A (3)

16. Liliacidites sp_---_-----_-------------------------------- D3697-B (1)

17. Liliacidites sp_____________.---______---___-_--_---__-- D3699-A (3)

18. Liliacidites sp. (same species as fig. 17, magnified X 2,000 to

show structure of reticulum)____________________________ D3699-A (1)
GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E PLATE 1

YAZOO POLLEN AND SPORES
PLATE 2

[Magnification X 1,000]

Locality and slide Nos.

FIGURE 1. Nymphaeaceae (see Monocolpopollenites nupharoides Kedves

1960)_____-__________________-- - - D3697-B (1)

2a. Nymphaeaceae, same species as fig. 1, low focus______________- D3699-A (3)

2b. Nymphaeaceae, same specimen as fig. 2a, high focus.

3. tAraucariacites sp. l_______________-__________________---_- D3699-A (3)

4. Abietineaepollenites sp. (Diploxylon type)___________________ D3697-B (1)

5. Inaperturopollenites cf. /. hiatus (R. Potonie) Thomson and

Pflug 1953_____ ___________ D3699-A (3)

6. Inaperturopollenites cf. /. hiatus (R. Potonie) Thomson and

Pflug 1953______________________________-____--_-----__ D3697-B (2)

7. Abietineaepollenites sp. (Diploxylon type)_____________________ D3699-A (4)

8. Abietineaepollenites sp. (Diploxylon type) ___________________ D3699-A (4)

9. Abietineaepollenites sp. (Diploxylon type)_ __________________ D3697-B (1)

10. Triporate pollen_________________________________ D3697-B (2)

11. Triporopollenites sp______________________________________ D3697-B (1)

12a. Monylcipollenites cf. M. confossus Fairchild, in Stover, Elsik, and

Fairchild 1966. High focus___________________________ D3699-A (3)

12b. Same specimen as fig. 12a. Low focus.

13. Triporopollenites sp____________________"____________________ D3699-A (3)

14. Abietineaepollenites (Diploxylon type)________________________ D3697-B (1)

15. fMomipites sp. (See M. coryloides Wode. 1933, in Englehardt

1964)__________________________________________________ D3697-B (1)

16. Triporopollenites sp_____________________________________ D3699-A (4)
GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E PLATE 2

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YAZOO POLLEN AND SPORES
PLATE 3

[Magnification X 1,000]

Locality and slide Nos.

FIGURE 1. Triatriopollenites sp__--_-----_____-------------________ D3697-B (2)

2. Triatriopollenites sp__------________-__-_-______________ D3699-A (3)

3. "?Engelhardtiodites cf. E. microcoryphaeus (Potonie) Potonie,

Thomson, and Thiergart 1950. (See Engelhardt 1964.)- ___ D3699-A (3)

4. Triatriopollenites sp_---------__----------__-_-__-_------- D3699-A (3)

5. Engelhardtioidites sp____________________________________ D3699-A (3)

6. Triatriopollenites cf. T. dilatus Fairchild in Stover, Elsik, and

Fairchild 1966._________________________________-_-_-._ D3699-A (4)

7. Triatriopollenites sp__------________________________ D3699-A (3)

8. fBetulaceoipollenites sp_______________-___-_-_---_--_-__- D3699-A (3)

9. Triatriopollenites sp. cf. T. plicatus Thomson and Pflug 1953__ D3699-A (1)

10. Carya sp. or Caryapollenites sp___________________________ D3699-A (3)

11. Carya sp. or Caryapollenites sp. cf. C. simplex (Potonie) Raatz

1937________________________________________________ D3697-B (1)

12a. Carya sp. or Caryapollenites sp. Low focus-_________________ D3699-A (1)

12b. Same specimen as fig. 12a. High focus.

13. Triporopollenites sp__ __________________________________ D3699-A (3)

14. Triatriopollenites sp_ ____ -_ __ __ ___ -__ D3699-A (1)

15. Triporopollenites sp__ __________________________________ D3699-A (3)

16. Ulmipollenites sp..,__________________________ _ D3699-A (1)

17. Polyporopollenites sp. (?four-pored Caryapollenites) ___________ D3699-A (3)

18. Alnus sp. or Alnipollenites sp. cf. A. verus (R. Potonie) ex. R.

Potonie 1934______________________________ D3699-A (3)

19. Trivestibulopollenites sp. cf. Paliurus triplicatus Anderson 1960_ D3697-B (1)

20. Alnus sp. or Alnipollenites sp_-_______-_---_--_-__-_------- D3697-B (2)

21. Polyporopollenites sp. (cf. pi. 2, fig. 15 tMomipites) ___________ D3699-A (3)

22. Ulmipollenites sp . D3699-A (3)

23. ?Aff. Nothofagus sp_______________________--___-___----_ D3697-B (2)

24. Multiporopollenites sp-^-- _______________________ D3697-B (1)

25. Ulmipollenites sp. cf. U. undulosus Wolff 1934 (see Engelhardt

1964)__________ ________ _________________ D3699-A (3)

26. Alnus sp. or Alnipollenites sp________________-__-_-__---__- D3697-B (1)

27. ?Aff. Notkofagussp D3699-A (3)

28. ?Aff. Nothofagus sp_____________________________________ D3699-A (3)

29. Juglanspollenites sp_____-_--________--_--_--_--_-__--_--_ D3699-A (3)

30. Juglanspollenites sp___-__ __ _ _-_ -- D3699-A (4)

31. Multiporopollenites sp________________________________ D3699-A (1)

32. Multiporopollenites sp_--_ _______________________ _ _ D3699-A (3)

33. Multiporopollenites sp____ _____ _ _ D3699-A (1)
PROFESSIONAL PAPER 643-E PLATE 3

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YAZOO POLLEN AND SPORES
PLATE 4

[Magnification X 1,000]

Locality and slide Nos.

FIGURE 1. Tricolpopollenites sp_______________-_-_____-_____________ D3699-A (3)

2. Tricolpopollenites sp_________________________ D3697-B (1)

3. Tricolpopollenites sp______________-_-_-_-_-_-__-__-_-__ D3697-B (1)

4. Tricolpopollenites sp_______________--_-_--_______________ D3697-B (1)

5. Tricolpopollenites sp. (figs. 3-5, probably the same species)___ D3697-B (1)

6. Tricolpopollenites sp___________________________________ D3699-A (4)

7. Tricolpopollenites sp___________________________ D3697-B (1)

8. Tricolpopollenites sp___________________________________ D3699-A (3)

9. Tricolpopollenites sp-- _________________________ D3697-B (2)

10. Tricolpopollenites sp. Same species as fig. 6_________________ D3699-A (3)

11. Tricolpopollenites sp.-. ____________________________ D3697-B (2)

12. Tricolpopollenites sp--- ________________________ D3697-B (2)

13a. Tricolpopollenites sp. High focus__________________________ D3697-B (1)

13b. Same specimen as fig. 13a. Low focus.

14. Tricolpopollenites sp_________________________________ D3699-A (3)

15. Cupuliferoipollenites sp---.------------------------------ D3697-B (1)

16. Cupuliferoipollenites sp_________________________________ D3697-B (1)

17. Tricolpopollenites sp. aff. Caprifoliaceae cf. Lonicera-,- ______ D3699-B (4)

18. Ilexpollenites sp_____________ _ _____________ D3697-B (1)

19. Ilexpollenites sp-_______________________________ D3699-A (3)

20a. Tricolpopollenites sp. Low focus_________________________ D3697-B (1)

20b. Same specimen as fig. 20a. High focus.

21a. Rhoipites sp. High focus__________ _- - D3699-A (3)

21b. Same specimen as fig. 21a. Low focus.

22a. Tricolporites sp. (fAraliaceoipollenites) Low focus___________ D3697-B (1)

22b. Same specimen as fig. 22a. High focus.

23. Cupaneiditessp---- _____________________________________ D3699-A (3)

24. Cupaneidites sp_----_-_________-___---________________ D3699-A (3)

25. Duplopollis sp_____________________________-_-_-_-_-_- D3699-A (1)

26. Duplopollis sp_____--____________-__-----_-_____--_---_- D3699-A (4)

27. Duplopollis sp------------ ______________ _______ ___ D3699-A (4)

28a. Tricolporites sp. High focus_ ______ ____ _ __________ D3697-B (1)

28b. Same specimen as fig. 28a. Low focus.

29. Tricolporites sp. (?Anacarediacea cf. Spondias. See Tsukada

	1964.)________________________________---_ D3699-A (3)

30. Tricolporites sp. (cf. Pollenites ventosus Potonie 1934)________ D3699-A (3)

31. Tricolporites sp------- ______________ ___________ ___ D3697-B (2)

32. Tricolporites sp______________________________ D3699-A (3)
GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E PLATE 4

23

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YAZOO POLLEN AND SPORES
PLATE 5

[Magnification X 1,000]

Locality and slide Nos.

FIGURE 1. Tricolporites sp. (See Tricolporopollenites marcodurensis Thomson and Pflug 1953; cf. Vitaceae, Parthenocissus.) ___________ D3697-B (1)

2a. Rhoipites sp. High focus__----_-______________________ D3699-A (3)

2b. Same specimen as fig. 2a. Low focus.

3. Tricolporites sp--- ________________________________________ D3699-A (4)

4. Sapotaceoidaepollcnites sp_________________________________ D3697-B (1)

5. Tricolporites sp--- ________________________________ D3699-A (3)

6a. Symplocoipollenites sp. Low focus____________________________ D3699-A (3)

6b. Same specimen as fig. 6a. High focus.

7a. Sapotaceoidaepollenites sp. High focus________________________ D3699-A (3)

7b. Same specimen as fig. 7a. Low focus.

8a. Sapotaceoidaepollenites sp. High focus______________-_-----_-_ D3697-B (1)

8b. Same specimen as fig. 8a. Low focus. 

9. Symplocoipollenites sp____________________________________ D3697-B (1)

10. Symplocoipollenites sp______________________________________ D3697-B (1)

1 la. Tiliaepottenites sp. High focus______________________ D3699-A (3)

lib. Same specimen as fig. lla. Low focus.

12. Symplocoipollenites sp_____________________-____--_------_ D3699-A (1)

13. Tiliaepollenitessp- ______________ __ _____________ ___ _ D3699-A (4)

14. Tiliaepollenitessp- ______________________________ D3699-A (3)

15. Tiliaepollenites sp. Probably the same species as fig. 14, but

possessing four apertures__ _ ______________________________ D3699-A (3)

16a. Tiliaepollenites sp. Low focus_____________________^_________ D3699-A (4)

16b. Same specimen as fig. 16a. High focus.

17. Bombacacidites sp_______-______________-_-_____-__-__-_--- D3699-A (4)

18. Bombacacidites sp--- ___ _________________________________ D3699-A (4)

19. Bombacacidites sp- ____________ ____ ____ _________ D3697-B (2)
GEOLOGICAL SURVEY PROFESSIONAL PAPER 643-E PLATE 5

YAZOO POLLEN AND SPORES