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1

New biostratigraphic evidence (calcareous nannofossils, ostracods, foraminifers, ammonites, inoceramids) on the Middle Coniacian in the eastern Bohemian Cretaceous Basin

Svobodova Andrea, Kočí Tomáš, Kočová-Veselská Martina, Ferré Bruno, Košťák Martin, Čech Stanislav, Chroustová Markéta

Geological Quarterly

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2019

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Vol. 63, No. 3

586--602

EN

The classical locality of Svinary in the eastern Bohemian Cretaceous Basin is the site of new biostratigraphic investigations. Besides some scarce macrofossil evidence, bulk sediment samples were processed to retrieve micropalaeontological assemblages, and calcareous nannofossil smear slides were analysed. The studied material provided calcareous nannofossil assemblages including Micula staurophora, Lithastrinus septenarius and Broinsonia parca expansa, thus documenting the Middle Coniacian (upper part of UC10 Zone and lower part of UC11 Zone). The foraminifera assemblage is relatively rich, planktonic species show a wide stratigraphical range, while the benthic association represented by Neoflabellina suturalis suturalis and Gaudryina carinata is very similar to the Coniacian biozone of Stensioeina granulata-Eponides whitei, valid for the Bohemian Cretaceous Basin. Ostracods are represented by two common cytherellid species, and two rare ornamented species: Imhotepia marssoni? and Pterygocythereis spinosa. Inoceramid bivalves, namely Platyceramus mantelli, and a newly recorded ammonite, Tridenticeras tridens, support the late Middle Coniacian age of the Svinary outcrop. New biostratigraphic results are given along with palaeoecological interpretations of newly collected fossil material.

2

Facies and sedimentation of Coniacian deposits of the Kraków Swell in the Wielkanoc area (southern Poland)

Olszewska-Nejbert D., Świerczewska-Gładysz E.

Geological Quarterly

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2013

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Vol. 57, No. 1

1–-16

EN

Coniacian deposits, ca. 1.5 m thick, cropping out in the Wielkanoc Quarry, north of Kraków in southern Poland, consist of firm, nodular and, less commonly, marly limestones with horizons of in situ, slightly phosphatized hexactinellid sponges and thick-shelled inoceramid bivalves. The succession is composed of foraminiferal-inoceramid packstones with common sand-sized quartz and glauconite grains at the base, passing upwards into foraminiferal or foraminiferal-inoceramid wackestones with or without rare glauconite. A microfacies analysis shows that planktonic foraminifers are the dominant forms, while benthic forms are rare. The facies indicates that sedimentation in the Wielkanoc area on the Kraków Swell, which separated the deeper Mid-Polish Trough Zone to the north-east and the Opole Trough Zone to the south-west, was generally calm (documented by abundant wackestones) and slow (indicated by the dominant sedimentary “coccolith system” and presence of glauconite) during the Coniacian. Rare episodes of non-deposition are recorded by episodes of phosphatization and minor intra-Coniacian discontinuity surfaces. The presence of hexactinellid sponges in the section studied are consistent with a calm environment, below the storm-wave base, with low rates of sedimentation. Subhercynian (latest Turonian–Coniacian Ilsede Phase) local tectonic movements had an important influence on the evolution of the region. They presumably led to subsidence of the Wielkanoc Block during the Early Coniacian. These movements were probably associated with activity on the Kraków–Myszków Fault Zone.

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Inoceramid and foraminiferal record and biozonation of the Turonian and Coniacian (Upper Cretaceous) of the Mangyshlak Mts., western Kazakhstan

Walaszczyk I., Kopaevich L. F., Beniamovski V. N.

Acta Geologica Polonica

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2013

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Vol. 63, no. 4

469--487

EN

The Turonian and Coniacian (Upper Cretaceous) of the Mangyshlak Mts., western Kazakhstan, yielded a rich and relatively complete inoceramid bivalve record. The faunas and their succession correspond to those known from central and eastern Europe, allowing the zonation established in the latter areas to be applied in a virtually identical form. The gaps in the record of the group in Mangyshlak stem from the regional hiatuses in the geological record in the area and do not reflect any biogeographical differences between eastern and central-western Europe. Planktonic foraminifera are rare. Four successive interval range zones can be distinguished: in ascending stratigraphic order, the Helvetoglobotrunaca helvetica, Marginotruncaca pseudolinneiana, Marginotruncana coronata, and Concavotruncana concavata zones. Their correlation with the inoceramid zonation and, consequently, with the chronostratigraphic scheme, is demonstrated. The zonation and chronostratigraphic subdivision as applied in Mangyshlak may easily be applied to other areas of the peri-Caspian region (Caucasus, Tuarkyr, Kopet-Dagh, SE margin of the East-European Craton).

4

Testing the congruence of the macrofossil versus microfossil record in the Turonian-Coniacian boundary succession of the Wagon Mound-Springer composite section (NE New Mexico, USA)

Walaszczyk I., Lees J., Peryt D., Cobban W., Wood C.

Acta Geologica Polonica

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2012

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Vol. 62, no. 4

581-594

EN

The Turonian-Coniacian boundary succession from the Wagon Mound-Springer composite section in the US Western Interior shows a virtually identical macrofaunal record to that revealed in the proposed candidate Coniacian GSSP in the Salzgitter-Salder-Slupia Nadbrzezna composite section in central Europe, with easy identification in both regions of the base of the Coniacian Stage, as defined by the first appearance of the inoceramid bivalve species, Cremnoceramus deformis erectus (Meek). The macrofaunal boundary definition is additionally confirmed by the foraminiferal and nannofossil data, demonstrating the high potential of the inoceramid marker for the base of the Coniacian. The former claims about distinct diachroneity between macrofossil and microfossil dates in the trans-Atlantic correlations, resulted from methodological deficiencies, and have no factual basis.

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The Salzgitter-Salder Quarry (Lower Saxony, Germany) and Slupia Nadbrzezna river cliff section (central Poland) : a proposed candidate composite Global Boundary Stratotype Section and Point for the Coniacian Stage (Upper Cretaceous)

Walaszczyk I., Wood C., Lees J., Peryt D., Voigt S., Wiese F.

Acta Geologica Polonica

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2010

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Vol. 60, no. 4

445-477

EN

An integrated account of a candidate composite Global Boundary Stratotype Section and Point for the base of the Coniacian Stage, comprising the Salzgitter-Salder Quarry section (Lower Saxony, Germany) and the Słupia Nadbrzeżna river cliff section (central Poland), is provided. Documented are all the main biostratigraphically significant macrofossil and microfossil groups: ammonites, bivalves (inoceramids and the genus Didymotis), planktonic foraminifera and calcareous nannoplankton. also provided are correlations based on stable carbon isotope curves. The base of the Coniacian is defined by the first occurrence (FO) of the inoceramid bivalve Cremnoceramus deformis erectus (Meek, 1876), a cladogenetic successor of the C. waltersdorfensis (Andert, 1911) lineage. This event is well above the first appearance of the classic ammonite marker of this boundary, Forresteria petrocoriensis (Coquand, 1859), which is first noted high in the Upper Turonian Mytiloides scupini inoceramid bivalve zone at Słupia Nadbrzeżna. The boundary at Salzgitter-Salder cannot be precisely defined by means of ammonites; however, there is an apparent local change in one scaphitid lineage a short distance below the boundary. In calcareous nannofossil terms, the boundary falls within the interval between the first occurrence of Broinsonia parca parca and the last occurrence (LO) of Helicolithus turonicus. at present, no planktonic species found in both sections can be used as a close proxy for the base of the Coniacian, as defined by the inoceramid bivalve marker. In terms of carbon stable isotopes, the Turonian Coniacian Boundary lies in the inflection point from falling to rising [delta^13]C values. a comparison of the Salzgitter-Salder and Słupia Nadbrzeżna carbon isotope curves indicates a hiatus at the former locality. The base of the Coniacian in the Salzgitter-Salder section is marked by a flood occurrence of Cremnoceramus deformis erectus, constituting the deformis erectus I event. The boundary interval at Słupia Nadbrzeżna is expanded: here the first occurrence of C. deformis erectus is separated from both the terminal Turonian C. waltersdorfensis waltersdorfensis event and the C. deformis erectus I event, also indicating the existence of a hiatus at the boundary in the Salzgitter-Salder section. In view of this hiatus at the critical level, it is proposed that the two sections should constitute a candidate composite Coniacian GSSP.

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Palaeontology and biostratigraphy of the Middle-Upper Coniacian and Santonian inoceramids of the US Western Interior

Walaszczyk I., Cobban W.

Acta Geologica Polonica

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2006

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Vol. 56, no. 3

241-348

EN

The taxonomy of the Middle-Late Coniacian and Santonian inoceramids of the US Western Interior, including some specimens from the Canadian Western Interior, is revised, based mainly on the extensive collections of the US Geological Survey. The classic Meek and Hayden material is discussed. Forty-four species are described of which 5 are new: Inoceramus americanus, Inoceramus sokolovi, Inoceramus robertsoni, Inoceramus glacierensis, and Sphenoceramus gilli. The Middle Coniacian to Santonian inoceramids of the Western Interior represent a uniform Euramerican fauna. This allows the application of a uniform biostratigraphical zonation throughout the whole biogeographical region. Starting in the Late Coniacian, inoceramid faunas are characterised by relatively strong north.south biogeographic differentiation. The inoceramid zonation applied is discussed, diagnosed, and compared to previously used schemes, and to the ammonite zonation commonly used in the US Western Interior.

7

Inoceramid/foraminiferal succession of the Turonian and Coniacian (Upper Cretaceous) of the Briansk region (Central European Russia)

Walaszczyk I., Kopaevich L., Olferiev A.

Acta Geologica Polonica

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2004

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Vol. 54, no. 4

597-609

EN

An integrated inoceramid-foraminiferal zonation for the topmost Turonian and Lower Coniacian near Briansk, SW of Moscow is presented. The inoceramid fauna enables the application of the refined zonal scheme currently applied in central and western Europe. Three zones based on benthic foraminifera, the Gavelinella moniliformis, Ataxophragmium nautiloides and Stensioeina granulata granulata zones; and three zones based on planktonic foraminifera, the Whiteinella archaeocretacea, Marginotruncana pseudolinneiana and Marginotruncana renzi zones, are distinguished. The Turonian/ Coniacian boundary, defined by the first appearance of the inoceramid Cremnoceramus deformis erectus (MEEK, 1877), falls within the basal part of the Stensioeina granulata granulata Zone and the basal part of Marginotruncana renzi Zone.In foraminiferal terms the Turonian/Coniacian boundary interval is marked additionally by a sudden, short-lived increase in the plankton/benthos ratio, caused primarily by more abundant shallow-water morphotypes.

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Forresteria (Harleites) petrocoriensis (Coquand, 1859) from the Upper Turonian Mytiloides scupini Zone of Słupia Nadbrzeżna, Poland

Kennedy W. J., Walaszczyk I.

Acta Geologica Polonica

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2004

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Vol. 54, no. 1

55--59

EN

Forresteria (Harleites) petrocoriensis (Coquand, 1859) the classic ammonite marker for the base of the Coniacian stage in the Aquitaine Basin, France, is recorded from the Upper Turonian Mytiloides scupini Zone of Słupia Nadbrzeżna, Poland. The position of the upper and lower limits of the petrocoriensis Zone in terms of the standard inoceramid zonation across the Turonian-Coniacian boundary interval remains uncertain, and the proposed base of the Coniacian - the first occurrence of Cremnoceras deformis erectus (Meek, 1877) - lies in the lower part of the range of F. (H.) petrocoriensis. The inoceramid-defined base of the Coniacian cannot be recognised in the environs of Cognac, the type locality of the stage.

9

Cenomanian through Lower Coniacian events in the Upper Cretaceous of Saxony, Germany

Troger K.

Acta Geologica Polonica

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2004

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Vol. 54, no. 4

629-638

EN

The event sequence recognised in the Cenomanian through basal Coniacian (Late Cretaceous) of the Elbe Valley is compared with the event stratigraphic scheme worked out in NW Germany. The following events, recognised originally in Lower Saxony, and subsequently in other Cretaceous areas of north-western Europe, were found in Saxony: Schloenbachia / virgatus eustatoevent (Lower Cenomanian); Chondrites ecoevent, Puzosia eustatoevent and plenus eustatoevent (Upper Cenomanian); hattini ecoevent, Mytiloides ecoevents, hercynicus ecoevent, Hyphantoceras ecoevent, Didymotis ecoevents and waltersdorfensis ecoevent (Turonian); erectus ecoevent, hannovrensis ecoevent, and incostans ecoevent (Lower Coniacian). Both the oxic/anoxic Cenomanian/Turonian boundary event and the facies change at the base of the Metoicoceras geslinianum Zone are recognisable. With the exception of the Mytiloides ecoevents, recorded in all facies types, all the events are well developed only in the marly-silty facies.Local events, specific to the Cretaceous of Saxony are: the Late Cenomanian Pennrich event, known from the Sudetic area, and the Middle Turonian rhynchonellid events, occurring in sandy and transitional facies between Pirna and Bad Schandau.

10

On some Late Turonian and Early Coniacian (Upper Cretaceous) heteromorph ammonites from Germany

Wiese F.

Acta Geologica Polonica

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2000

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Vol. 50, no. 4

407-419

EN

Five heteromorph ammonite taxa belonging to the Nostoceratidae and the Diplomoceratidae are described from the Upper Turonian and Lower Coniacian of northern Germany and Saxony. The investigation serves the presentation of additional material of Hyphantoceras flexuosum, Neocrioceras paderbornense and Scalarites turoniense that are rarely documented in northern Germany and Saxony. Furthermore, one new species, Hyphantoceras ernsti sp. n., is introduced. One taxon is described in open nomenclature as nostoceratid gen. et sp. indet

11

Inoceramid bivalves at the Turonian/Coniacian boundary: biostratigraphy, events and diversity trend

Walaszczyk I.

Acta Geologica Polonica

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2000

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Vol. 50, no. 4

421-430

EN

The Turonian/Coniacian boundary marks one of the main turnover levels in the Late Cretaceous history of the inoceramid bivalves. The change from the Mytiloides-dominated Late Turonian fauna to the Cremnoceramus-dominated Early Coniacian fauna was a dramatic experience for the group, with a series of successive assemblages interrupted by their almost total elimination, and with intervening short-term expansions of the bivalve Didymotis. The taxonomic diversity dropped to a few species per interval calculated and marks the lowest level in their Late Cretaceous history, comparable to the trough around the Cenomanian/Turonian boundary. The whole change must have taken no longer than a quarter of a milion years and its duration could have been as short as some tens of thousand years

12

Coniacian (Upper Cretaceous) ammonites from the North Cantabrian BaSIN (Cantabria, northern Spain)

Wiese F.

Acta Geologica Polonica

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2000

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Vol. 50, no. 1

125-141

EN

A small Coniacian ammonite fauna is described from the North Cantabrian Cretaceous Basin (Cantabria, northern Spain). 11 species, belonging to nine genera, are treated. These are Gaudryceras mite, Forresteria (Forresteria) alluaudi, Peroniceras (Peroniceras) westphalicum, P. (P.) subtricarinatum, P. (P.) cf. lepeei, Puzosia (P.) muelleri, Tetragonites epigonum, Tissotioides haplophyllum, Tongoboryceras cf. canali and Scaphites cf. kieslingswaldensis. Yabeiceras manasoaense is described for the first time from Europe. The poor fauna does not permit any refined stratigraphic subdivision, but the general distribution pattern fits that observed in other areas. An Early Coniacian age suggested for the assemblage. Biogeographically, the fauna presumably reflects intermediate conditions between the Tethys and the Boreal