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GEOLOGICA CARPATHICA, 50, 2, BRATISLAVA, APRIL 1999

145–150

CORRELATION OF THE UPPER TURONIAN FORAMINIFERAL

ASSEMBLAGE FROM THE ÚPOHLAVY AND BØEZNO SECTIONS

(BOHEMIAN CRETACEOUS BASIN) WITH SOME OTHER LOCALITIES

(SOUTH MORAVIA, GERMANY AND LOWER AUSTRIA)

LENKA HRADECKÁ

Czech Geological Survey, Klárov 131/3, 118 21 Praha 1, Czech Republic

(Manuscript received January 21, 1998; accepted in revised form December 9, 1998)

Abstract: A correlation study was performed on the Upper Turonian foraminiferal assemblage from two localities in

NW Bohemia Úpohlavy and Bøezno and the localities including Dresden-Strehlen in Saxony, Turold in South Moravia

and type locality of Klement in Lower Austria. The Upper Turonian sediments (Teplice Formation) from the Úpohlavy

quarry and the Bøezno-Pd 1 borehole contained foraminiferal assemblage represented by abundant, well-preserved

tests of agglutinated and calcareous species. Three levels of change of benthic foraminiferal assemblage was recog-

nized in these sediments. The first change — the disappearance of Cassidella tegulata (Reuss), Praebulimina crebra

Štemproková, Gaudryina compressa Akimec and Dorothia pupa (Reuss). At the second change Gaudryina carinata

Franke, Gaudryina laevigata Franke, Gavelinella berthelini (Keller) and Pyramidina kelleri (Vasilenko) appeared.

The third less significant level is characterized by the disappearance of P. kelleri and G. laevigata.

Key words: Bohemian Cretaceous Basin, Late Turonian correlation, Foraminifera.

were selected for correlation study of the Upper Turonian for-

aminiferal assemblage from the Teplice Formation.

The Upper Turonian sediments from Úpohlavy quarry be-

long to limestone-marl facies of the Jizera and Teplice Forma-

tion (Èech et al. 1980). The Teplice Formation from Bøezno

locality (borehole Pd-1) consists of dark grey calcareous clay-

stones, marlstones and limestones. The Klement Formation

from Turold quarry and Klement type locality comprises car-

bonate and also pelitic-psammitic sequences. The carbonate

sequence of the Turold quarry is characterized by strong re-

crystallization of calcareous microfossils (Stráník et al. 1996).

Introduction

The Úpohlavy and Bøezno sections were studied during prep-

aration of a fieldguide for the Fifth International Cretaceous

Symposium in Freiberg. Micropaleontological study of the

Úpohlavy section was done for the first time. Foraminiferal

assemblage study of the Bøezno locality was done earlier by

Hercogová in Macák & Müller 1968 and Štemproková in

Pokorný et al. 1983. The revision of samples from Pd-1 bore-

hole (Bøezno) was performed for this paper.

A substantial part of the Úpohlavy and Bøezno sections are

formed by sediments of the Teplice Formation (Upper Turoni-

an) with relatively abundant assemblages of benthic and

planktonic foraminifers. Recently, 63 samples from Úpohlavy

quarry were taken and more than 80 species of foraminifers

were recognized.

Revision of foraminiferal taxonomy from 55 samples from

the borehole Pd-1 (Bøezno) was done in order to compare the

foraminiferal assemblages.

The studied localities (Úpohlavy and Bøezno-borehole Pd-1)

are situated in the NW part of the Bohemian Cretaceous Basin

which is a component of the Bohemian-Saxon Cretaceous Ba-

sin situated on the edge of the North European Platform. Ac-

cording Èech & Ulièný (1996) and Stráník et al. (1996), these

relatively shallow marine sediments of the Bohemian-Saxon

Cretaceous Basin can be correlated with the autochthonous sed-

iments covering the SE slope of the Bohemian Massif in South

Moravia and Lower Austria (Fig. 1).

Hence, Dresden-Strehlen locality in Saxony (Strehlener

Formation) and two localities (Turold and Klement) belonging

to the autochthonous Upper Cretaceous Klement Formation

Fig. 1. Location of the studied sections.

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146                                                                                          HRADECKÁ

Fig. 2: The correlation of the Upper Turonian foraminiferal assemblages. 1 — sandstone, 2 — sand, 3 — calcareous claystone, 4 — marlstone, 5 — marlstone > 60 % CaCO

3

, 6 — slope loams,

7 — limestone, 8 — claystone, 9 — limestone with silt and clay admixture, 10 — limestone with glauconite admixture, 11 — lenses of silicified and dolomitized limestone.

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UPPER  TURONIAN  FORAMINIFERAL  ASSEMBLAGE  

   

                                              

    147

Fig. 3. The correlation of the Upper Turonian foraminiferal assemblages.  * in tectonic position; for legend see Fig. 2.

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148                                                                                          HRADECKÁ

PLATE  I

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UPPER  TURONIAN  FORAMINIFERAL  ASSEMBLAGE                                                       149

Plate I: Figs. 1, 2. Praebulimina crebra Štemproková; Úpohlavy

1.60 m, 80

×

; Fig. 3. Praebulimina reussi (Morrow); Úpohlavy 2.80

m, 100

×

; Fig. 4. Marssonella  oxycona (Reuss); Úpohlavy 4.00–

4.10 m, 90

×

; Fig. 5. Cassidella tegulata (Reuss); Úpohlavy 1.70 m,

60

×

; Fig. 6. Pyramidina kelleri (Vasilenko); Úpohlavy 680–6.90 m,

60

×

; Fig. 7. Gaudryina laevigata Franke; Úpohlavy 3.80 m, 60

×

;

Fig. 8. Gaudryina laevigata Franke; Úpohlavy 2.50 m, 40

×

; Fig. 9.

Gaudryina carinata Franke; Úpohlavy 3.40 m, 60

×

; Fig. 10. Gaud-

ryina trochus (d’Orbigny); Úpohlavy 4.00–4.10 m, 90

×

; Fig. 11. Tri-

taxia tricarinata (Reuss); Úpohlavy 7.00 m, 30

×

; Fig. 12. Tritaxia

macfadyeni Cushman; Úpohlavy 7.00 m, 80

×

; Fig. 13. Arenobulimi-

na dorbignyi; Úpohlavy 6.65–6.75 m, 60

×

; Fig. 14. Neoflabellina

sp.; Úpohlavy 5.20–5.30 m, 25

×

; Fig. 15. Gavelinella berthelini

(Keller); Úpohlavy 7.00 m, 90

×

; Fig. 16. Gavelinella moniliformis

(Reuss); Úpohlavy 7.85 m, 80

×

; Fig. 17. Whiteinella sp.; Úpohlavy

1.70 m, 100

×

; Fig. 18. Dicarinella imbricata (Mornod); Úpohlavy

8.80–8.90 m, 80

×

; Fig. 19. Hedbergella delrioensis (Carsey);

Úpohlavy 2.80 m, 70

×

; Fig. 20. Marginotruncana coronata Bolli;

Úpohlavy 6.65–6.75 m, 60

×

; Fig. 21. Helvetoglobotruncana helveti-

ca (Bolli); Úpohlavy 0.70 m, 70

×

; Fig. 22. Marginotruncana margi-

nata  (Reuss); Úpohlavy 6.65–6.75 m, 70

×

. Photomicrographs by

Ananda Gabašová, Czech Geological Survey Prague.

Method

63 samples from the Úpohlavy section were washed in the

Chemical Laboratory of the Czech Geological Survey. Fora-

minifers were isolated from the samples of approximately 0.5–

0.7 kg of weight using the usual method of sieving through

0.063 mm sieves and silk. Foraminifers were studied using bin-

ocular light microscope. Photographs of foraminiferal species

were made using SEM photomicrograph.

Foraminiferal correlation

More than 80 species of foraminifers were recognized from

63 samples taken from marlstones and limestones of the Jizera

and Teplice Formations in the Úpohlavy quarry. There are

three distinct levels of change of the foraminiferal as-

semblages (Fig. 2).

1h.i.-change: Xa/Xb.

The first change is associated with disappearance of benthic

foraminifers Cassidella tegulata (Reuss), Praebulimina crebra

Štemproková,  Gaudryina compressa Akimec and Dorothia

pupa (Reuss) at the base of the unit Xb.

Similar change was observed also in the depth about 50 m

in the Bøezno-borehole Pd-1 where moreover the lithological

change between marlstones and calcareous claystones is ap-

parent.

This level marks the base of the foraminiferal A1 as-

semblage Zone of Wejda (1993) using in Saxony.

This level represents the lower part of the Teplice Forma-

tion which is well correlated with Räcknitzer Formation in

Saxony. The autochthonous sediments of SE slope of the Bo-

hemian Massif are not correlated with this level because the

Klement Formation presents the upper to the uppermost part

of the Teplice Formation.

Below this level (in the unit Xa), highly diversified plank-

tonic foraminifers prevail, especially the genus Heterohelix.

Keeled planktonic foraminifers (Marginotruncana) indicate

relatively deeper-water conditions.

2h.i.-change: Xb

a

/Xb

b.

Above the base of the Zone A1 (Wejda 1993) in the unit

Xb, juvenile specimens of planktonic foraminifers prevail

(e.g. Hedbergella and Whiteinella), where among purely

benthic foraminifers only Tritaxia tricarinata (Reuss), Tritax-

ia macfadyeni Cushman and Marssonella oxycona (Reuss)

are common in the Úpohlavy and Bøezno (Pd-1) sections.

Near the Xb

a

/Xb

b

 boundary in the Úpohlavy section, an-

other change appears comprising an abundant, highly diver-

sified assemblage of foraminifers. The first appearance of

the species Gaudryina carinata Franke, Gaudryina laeviga-

ta Franke (also in Bøezno-Pd-1), Gavelinella berthelini

(Keller) and Pyramidina kelleri (Vasilenko) indicate the base

of the Zone A of Wejda (1993), with the appearance of G.

carinata, P. kelleri and Praebulimina intermedia Štemprok-

ová (Fig. 2). The last named has its first appearance above

the Xb

a

/Xb

b

 boundary in the Úpohlavy section. Keeled

forms, such as Marginotruncana and Dicarinella dominate

within planktonic foraminifers. This second change level in

the Teplice Formation (Úpohlavy and Bøezno-Pd-1 bore-

hole) can be correlated with the Upper Turonian sediments

of the Klement Formation in South Moravia and Lower Aus-

tria (Fig. 3). In these autochthonous sediments the character

of the foraminiferal assemblage is slightly different due to

the Tethyan Realm. Some benthic species are missing and

the diversity of the planktonic species is higher than benthic

ones. But the presence of Gaudryina carinata, Gavelinella

berthelini give evidence for near relations to the Boreal bio-

province. The foraminiferal assemblage from the carbonate

sequence of the Turold quarry is characterized by strong re-

crystallization of the calcareous tests of Praebulimina, Gav-

elinella,  Globigerinoides and Hedbergella (Stráník et al.

1996) and also by sandy and sandy clayey sediments of the

Klement Formation in the Klement type locality which con-

tained relatively poorly-preserved tests of the foraminifers.

From the benthic species, Marssonella oxycona (Reuss)

dominated. Planktonic species represented by genera

Whiteinella, Hedbergella, Marginotruncana and Dicarinella

are poorly preserved in the calcareous claystones of the Kle-

ment Formation.

3h.i.-change: Xb

b

/Xb

c

.

The third level of the foraminiferal changes was marked in

the uppermost part of the unit Xb

b

 in the Úpohlavy section

(Figs. 2, 3). This, not very significant level is characterized

by appearance of P. kelleri and G. laevigata. This change of

foraminiferal assemblage is not clearly recorded in the Up-

per Cretaceous sediments of the Klement type locality

(Hradecká in Summesberger et al., in press) and Turold quar-

ry (Stráník et al. 1996).

Only general changes of planktonic foraminiferal assem-

blage was observed in the studied samples. No planktonic

v

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150                                                                                          HRADECKÁ

species important for planktonic foraminiferal zonation

(Robaszynski & Caron 1995) was found, excepting Helveto-

globotruncana helvetica, a rare occurrence of which was ob-

served in the lower part of unit Xb

a

 in the Úpohlavy section.

Conclusions

The study of the Upper Turonian sediments from the dif-

ferent localities enabled correlation of the foraminiferal as-

semblages. Sediments of the Teplice Formation from two lo-

calities (Úpohlavy, Bøezno-Pd-1) in the NW part of the

Bohemian Cretaceous Basin contain characteristic boreal

fauna. On the basis of the changes of foraminiferal assem-

blage, three levels are recognized within the Bohemian-

Saxonian Cretaceous Basin. The rich and highly diversified

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