Inoceramid stratigraphy and depositional architecture of the Campanian and Maastrichtian of the Miechów Synclinorium (southern Poland)

Abstract

Dynamic evolution of the Campanian and Maastrichtian (Upper Cretaceous) of the Miechow Synclinorium is presented. Through chronostratigraphic analysis, the geometry of the Campanian and Maastrichtian of the area is interpreted, while microfacies analysis allowed determination of some of the paleoenvironmental parameters (rate of sedimentation, bottom condition and terrigenous input). The chronostratigraphy is based on inoceramid biostratigraphy. Nine inoceramid zones are recognized: Sphenoceramus patootensiformis, Sphaeroceramus sarumensis-Cataceramus dariensis and ‘Inoceramus’ azerbaydjanensis-‘Inoceramus’ vorhelmensis, ‘Inoceramus’ tenuilineatus, Sphaeroceramus pertenuiformis, ‘Inoceramus’ inkermanensis and ‘Inoceramus’ costaecus- ‘Inoceramus’ redbirdensis (Campanian); Endocostea typica and Trochoceramus radiosus (Maastrichtian). Five unconformities (isochronous in the study area) represented by horizons of slower sedimentation rate, were recognized. They correlate with eustatic sea-level changes, well recorded in European successions (Jarvis et al. 2002, 2006; Niebuhr et al. 2011). Unconformity horizons allow six alloformations to be distinguished. The thickness of particular chronostratigraphic units within the Campanian and Lower Maastrichtian increases progressively toward the axis of the Danish-Polish Trough, which indicates that the inversion of the trough could not have started before the Late Maastrichtian.

Integrated biostratigraphy of the Santonian through Maastrichtian (Upper Cretaceous) of extra-Carpathian Poland

“…Subsequent studies on the Western Interior material (Walaszczyk et al 2001) and European faunas (from Tercis: Odin and Walaszczyk 2003; and from the Middle Vistula section: Walaszczyk 2004; as well as slightly earlier reports from various parts of Europe: Walaszczyk et al 1996;Walaszczyk 1997) confirmed the preliminary results. Recently, the group was successfully applied to the biostratigraphic study of the Campanian and Maastrichtian of the Nida Synclinorium (Jurkowska 2016; see also Jurkowska et al 2015).…”

“…Twenty-eight benthic foraminiferal zones, corresponding to an interval from the middle Coniacian (Volviceramus involutus Zone) up to the end of the Maastrichtian (Hoploscaphites constrictus johnjagti Zone sensu Machalski 2005a), are distinguished based on the material from more than 50 sections, published in Dubicka and Peryt 2011, 2016Dubicka 2015;Jurkowska et al 2015;Machalski et al 2016;Peryt and Dubicka 2016 (see Text-figs 3, 4). The foraminiferal zones are correlated against the macrofossil zonations of Błaszkiewicz (1980), Walaszczyk (1997Walaszczyk ( , 2004, Jagt et al (2004), Remin, (2012Remin, ( , 2015, and Jurkowska (2016), recognized in the same outcrops (Text- fig.…”

“…Unfortunately, the zonation worked out on the borehole material was not directly correlated to the macrofossil standard zonation and consequently, its chronostratigraphic interpretation was difficult. The recent restudy of selected sections with well-constrained chronostratigraphy (Dubicka 2012(Dubicka , 2015Peryt 2011, 2012a, b;, 2016Jurkowska et al 2015;Peryt and Dubicka 2015;Machalski et al 2016) allowed for the precise and rigorous correlations between micro-and macrofossil zonations. The summary on the recent development in the benthic foraminiferal zonation and its correlation to the chronostratigraphic standard is presented below.…”

“…The zone is well exposed between the villages of Dorotka and Ciszyca in the Middle Vistula River section. The zone is also exposed in the Nida Synclinorium (Błaszkiewicz 1980;Jurkowska 2016) and in the Roztocze Hills . Błaszkiewicz, 1980] Interval Zone.…”

Fossil karst in the Jurassic of the Kościuszko Mound in Kraków (southern Poland): discussion

“…The au thors wrote (p. 68) that the Maastrichtian green ish-grey clay does not con tain sand in spite of the youn ger karst sed i ments de scribed in the lit er a ture (Gradziñski, 1962;Felisiak, 1992). How ever, the ab sence of sand ad mix ture in the green ish-grey clay is very un usual because sand frac tion is a typ i cal com po nent of true Maastrichtian ma rine rocks (Jurkowska, 2016).…”