Dinoflagellate cysts of the upper Campanian–basal Maastrichtian (Upper Cretaceous) of the Middle Vistula River section (central Poland): stratigraphic succession, correlation potential and taxonomy

2021 ◽  
Author(s):  
Mariusz Niechwedowicz ◽  
Ireneusz Walaszczyk
Keyword(s):  
Upper Cretaceous ◽  
River Section ◽  
Dinoflagellate Cysts ◽  
Central Poland ◽  
Vistula River ◽  
Correlation Potential ◽  
Stratigraphic Succession ◽  
Upper Campanian

Hexactinellid sponge assemblages across the Campanian– Maastrichtian boundary in the Middle Vistula River section, central Poland

2012 ◽  
Vol 62 (4) ◽  
pp. 561-580 ◽  
Author(s):  
Ewa Świerczewska-Gładysz
Keyword(s):  
Sea Level ◽  
Environmental Changes ◽  
River Valley ◽  
River Section ◽  
Sea Level Changes ◽  
Central Poland ◽  
Vistula River ◽  
Hexactinellid Sponge ◽  
Hexactinellid Sponges ◽  
Upper Campanian

ABSTRACTŚwierczewska-Gładysz, E. 2012. Hexactinellid sponge assemblages across the Campanian-Maastrichtian boundary in the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (4), 561-580. Warszawa.The sponge fauna from the Upper Campanian-lowermost Maastrichtian succession of the Middle Vistula River valley (central Poland) is represented mainly by dictyid hexactinellid sponges (Hexactinosida and Lychniscosida). Their greatest abundance and taxonomic variability is noted in the “Inoceramus” inkermanensis Zone (Upper Campanian), and they are less diverse in the overlying (Upper Campanian) Trochoceramus costaecus Zone and lower “Inoceramus” redbirdensis Zone. In the upper “Inoceramus” redbirdensis Zone (basal Maastrichtian in the sense of the Tercis rather than the Boreal definition) they are extremely rare. With the beginning of the Maastrichtian the number of dictyid sponges gradually increases.The observed changes in the abundance and taxonomic variability of the dictyid sponges indicate environmental changes in the latest Campanian-earliest Maastrichtian sea in the area. It seems that changes in basin bathymetry, confined to eustatic sea-level changes in the latest Campanian and early Maastrichtian, were the most important factor. Progressive shallowing of the basin in the latest Campanian drastically restricted the development of dictyids. In the peak regression, the sea level could have fallen to only several tens of metres. The gradual recovery of the sponge assemblages correlates with subsequent deepening of the basin with the start of the Maastrichtian

Stratigraphically important ammonites from the Campanian–Maastrichtian boundary interval of the Middle Vistula River section, central Poland

2012 ◽  
Vol 62 (1) ◽  
pp. 91-116 ◽  
Author(s):  
Marcin Machalski
Keyword(s):  
Formal Definition ◽  
River Section ◽  
Central Poland ◽  
Vistula River ◽  
First Occurrence ◽  
Stratotype Section ◽  
Definition Of ◽  
Boreal Realm ◽  
Upper Campanian

ABSTRACT Machalski, M. 2012. Stratigraphically important ammonites from the Campanian-Maastrichtian boundary interval of the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (1), 91-116. Warszawa. The formal definition of the Global Stratotype Section and Point (GSSP) for the base of the Maastrichtian Stage at Tercis, southwest France, is based on the first or last occurrences of twelve taxa, including three species of ammonites, Pachydiscus (Pachydiscus) neubergicus, Diplomoceras cylindraceum, and Nostoceras (Nostoceras ) hyatti. The taxonomy and stratigraphical distribution of these, and allied forms, are studied, on the basis of material from the opoka succession across the upper Campanian-lowermost Maastrichtian boundary in the Middle Vistula River section, central Poland. In view of the imprecise location of two ammonite GSSP markers in that section, a direct ammonite-based correlation with the GSSP at Tercis is impossible. However, data available indicate that in the Middle Vistula River section the first occurrence of Pachydiscus (P.) neubergicus and the last occurrence of Nostoceras (N.) hyatti are situated significantly higher than the first occurrence of Belemnellalanceolata, the traditional belemnite marker for the base of the Maastrichtian Stage in the Boreal Realm, and that Diplomoceras cylindraceum appears significantly below this level. There are no unequivocal records of Pachydiscus (P.) neubergicus from the Belemnella lanceolata Zone s.l. in the Middle Vistula River section.

Early representatives of the belemnite genus Belemnella (Cephalopoda) from the uppermost Campanian–Lower Maastrichtian of the Middle Vistula River section, central Poland

2012 ◽  
Vol 62 (4) ◽  
pp. 535-559 ◽  
Author(s):  
Norbert Keutgen ◽  
Zbigniew Remin ◽  
Ireneusz Walaszczyk
Keyword(s):  
Species Concept ◽  
River Valley ◽  
River Section ◽  
Northern Germany ◽  
Central Poland ◽  
Vistula River ◽  
Senior Synonym ◽  
Lower Maastrichtian ◽  
New Interpretation ◽  
Valley Section

ABSTRACT Keutgen, N., Remin, Z. and Walaszczyk, I. 2012. Early representatives of the belemnite genus Belemnella (Cephalopoda) from the uppermost Campanian-Lower Maastrichtian of the Middle Vistula River section, central Poland. Acta Geologica Polonica, 62 (4), 535-559. Warszawa. Representatives of the belemnite genus Belemnella from the uppermost Campanian and lowermost Maastrichtian of the Middle Vistula River Valley section (central Poland) have been studied, using the species concept proposed by Schulz in 1979. Results have been compared to a recently proposed new interpretation of the genus Belemnella based on artificial neural networks, as put forward by Remin in 2007 and 2012. In the interval studied, four taxa have been recognised: Bln. longissima, Bln. inflata, Bln. obtusa and Bln. vistulensis, the last-named being a senior synonym of Bln. pseudobtusa. Three additional forms have been left in open nomenclature: Bln. cf. lanceolata , Bln. ex gr. lanceolata/inflata and Belemnella sp. Based on their documented vertical ranges, three Belemnella standard zones, as originally distinguished in the Kronsmoor section by Schulz (1979), northern Germany, have been defined, in ascending order: the Bln. lanceolata, Bln. vistulensis and Bln. obtusa zones. The bases of the lanceolata and obtusa zones in the Middle Vistula River Valley section can be directly correlated with the same zones at Kronsmoor, and appear to be isochronous within limits of stratigraphic resolution. The base of the vistulensis Zone (Bln. vistulensis according to the species concept of Schulz in 1979), however, is probably diachronous, being older in the Middle Vistula section. Although Schulz’s and Remin’s species concepts differ quite considerably, they do result in similar stratigraphic subdivisions of the Kronsmoor and Middle Vistula River sections.

Areoligeracean dinoflagellate cysts from the upper Campanian (Upper Cretaceous) of Hornby Island, British Columbia, Canada

Palynology ◽  
2018 ◽  
Vol 43 (4) ◽  
pp. 669-689 ◽  
Author(s):  
Sandy M. S. McLachlan ◽  
Vera Pospelova ◽  
Richard J. Hebda
Keyword(s):  
British Columbia ◽  
Upper Cretaceous ◽  
Dinoflagellate Cysts ◽  
Upper Campanian

scholarly journals Magnetostratigraphy of the Campanian/Maastrichtian boundary succession from the Middle Vistula River section, central Poland

2015 ◽  
Vol 59 (4) ◽  
Author(s):  
Tomasz PLASOTA ◽  
Jerzy NAWROCKI ◽  
Ireneusz WALASZCZYK
Keyword(s):  
River Section ◽  
Central Poland ◽  
Vistula River
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