Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

The stratigraphically youngest calcareous nannofossils of the Bohemian Cretaceous Basin


Lilian Švábenická, Petr Kycl, Vladislav Rapprich

Geoscience Research Reports 49, 2016, pages 19–25

Full text (PDF, 1.25 MB)

Published online: 30 June 2016

Export to RIS



The youngest hithero known calcareous nannofossils of the Bohemian Cretaceous Basin were found in the area of Litoměřice, NW Bohemia. Rocks were sampled during the engineering-geological explorative works of landslide near Dobkovičky for the purpose to detect their origin (Figs 1 and 2, Table 1). The presence of nannofossils reliably distinguished sediments of the Bohemian Cretaceous Basin from the altered Tertiary volcaniclastics and Tertiary and Quaternary deposits that were macroscopically alike. Landslide was activated in June, 2013 and radically damaged the under construction body of high-way D8 Prague-Dresden.
Grey, whitish grey and light green-grey marly claystones of the Březno Formation provided well preserved nannofossils with biostratigraphic markers Lucianorhabdus cayeuxii and Micula concava indicating the Upper Coniacian with the questionable exceed into Santonian. Three following nannofossil associations were recognized: 1 - Micula staurophora, Lithastrinus septenarius and sporadic Marthasterites furcatus, UC10 zone; 2 - Lithastrinus grillii and Lucianorhabdus inflatus, zone UC11a-b zone; 3 - Lucianorhabdus cayeuxii, L. arcuatus, Micula concava and M. cubiformis, UC11c zone (Table 2). Moreover, the association No. 3 contains species their first occurrence is mentioned from the uppermost Coniacian - Cribrocorona gallica, Gartnerago clarusora, G. margaritatus, Staurolithites imbricatus, Tortolithus dodekachyleon, and Prediscosphaera cf. desiderograndis (Fig. 3). Abundance of nannofossils and their excelent preservation document shallow epicontinental sea of normal salinity. The quantitative fluctuations of Biscutm ellipticum and Helicolithus trabeculatus are recorded. These phenomena may reflect the paleoenvironmental changes connecting with the Coniacian-Santonian boundary interval. Distribution of nannofossil marker species, biostratigraphic interpretation and photodocumentation are presented. Macrofauna was not recorded.
Nannofossils were investigated from the isolated chip sampling and not from the continuous section. Deposits were sampled from three boreholes surrounding landslide, two manual soil-sounding and from the side minor scarp of the landslide. So, the presented data have only the informative character.


Blair, S. A. - Watkins, D. K. (2009): High-Resolution Calcareous Nannofossil Biostratigraphy for the Coniacian/Santonian Stage Boundary, Western Interior basin. - Cret. Res. 30, 367-384.

Bubík, M. - Čech, S. - Hradecká, L. - Švábenická, L. (2001): A.12. Lužice ("Luschitz"). In: Bubík, M., ed.: Fossil record of agglutinated rhizopods (Foraminifers, Testaceans) on the territory of the Czech Republic. Field trip guide of the 6th IWAF, Prague 2001, 53-56. - Czech Geol. Survey. Prague.

Burnett, J. A. (1998): Upper Cretaceous. In: Bown, P. R., ed.: Calcareous Nannoplankton

Biostratigraphy. - Brit. Micropalaeont. Soc. London, 132-199.

Čech, S. - Hercogová, J. - Knobloch, E. - Pacltová, B. - Pokorný, V. - Sajverová, E. - Slavík, J. - Švábenická, L. - Valečka, J. (1987): Upper Cretaceous in the borehole Volfartice Vf-1. - Sbor. geol. Věd, Geol. 42, 113-159 (in Czech with English summary).

Čech, S. - Klein, V. - Kříž, J. - Valečka, J. (1980): Revision of the Upper Cretaceous stratigraphy of the Bohemian Cretaceous Basin. - Věst. Čes. geol. Úst. 55, 5, 277-296.

Hampton, M. J. - Bailey, H. W. - Gallagher, L. T. - Mortimore, R. N. - Wood, Ch. J. (2007): The biostratigraphy of Seaford head, Sussex, southern England; an international reference section for the basal boundaries for the Santonian and Campanian Stages in chalk facies. - Cret. Res. 28, 46-60.View article

Kaplan, U. - Kennedy, W. J. (2000): Santonian ammonite stratigraphy of the Münster Basin, NW Germany. ? Acta Geol. pol. 50, 99-117.

Kędziersky, M. (2008): Calcareous nannofossil and inoceramid biostratigraphies of a Middle Turonian to Middle Coniacian section from the Opole Trough of SW Poland. - Cret. Res. 29, 451-457.View article

Lees, J. A. (2008): The calcareous nannofossil record across the Late Cretaceous Turonian/Coniacian boundary, including new data from Germany, Poland, the Czech Republic and England. - Cret. Res. 29, 40-64.View article

Melinte, M. C. - Lamolda, M. A. (2007): Calcareous nannofossil biostratigraphy of the Coniacian/Santonian boundary interval in Romania and comparison with other European regions. - Cret. Res. 28, 1, 119-127.

Svobodová, A. - Košťák, M. - Čech, S. - Švábenická, L. (2014): New biostratigraphic evidences (texanitid ammonites, inoceramids and calcareous nannofossils) for the Upper and the uppermost Coniacian in the Bohemian Cretaceous Basin. - Z. Dtsch. Gesell. Geowiss. spec. vol. “Cretaceous basins” 165, 4, 577-589.

Švábenická, L. (2010): Late Turonian and Turonian-Coniacian boundary according to study of calcareous nannofossils in the Bohemian Cretaceous Basin, Jizera development. - Zpr. geol. Výzk. v Roce 2009, 58-64 (in Czech with English abstract).

Švábenická, L. (2012): Nannofossil record across the Cenomanian-Coniacian interval in the Bohemian Cretaceous Basin and Tethyan foreland basins (Outer Western Carpathians), Czech Republic. - Geol. carpath. 63, 201-217. View article

Švábenická, L. (2015): Nannofossil correlation across the Cenomanian to Conicacian interval, Bohemian Cretaceous Basin and Waschberg-Ždánice-Subsilesian Unit, Outer Western Carpathians. In: Bubík, M. - Ciurej, A. - Kaminski, M. A., ed.: 16th Czech-Slovak-Polish Palaeontological Conference and 10th Polish Mikropalaeontological Workshop. - Abstract Book and Excursion Guide, Grzybowski Found. Spec. Publ. 21, 69-71.