Inoceramid bivalves and biostratigraphy of the upper Albian and lower Cenomanian of the United States Western Interior Basin

Walaszczyk, Ireneusz; Cobban, William A.

doi:10.1016/j.cretres.2015.10.019

Cited by 22 publications

(30 citation statements)

References 24 publications

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“…Inoceramid biostratigraphy enables application of unified zonation recognized recently in the Western Interior (US) (Walaszczyk et al 2001), Tercis (France) (Walaszczyk et al 2002a), northern Germany (Walaszczyk 1997) and in the Middle Vistula River section (Walaszczyk 2004).…”

Section: Inoceramid Biozonationmentioning

confidence: 99%

“…The bases of the middle and upper Campanian substages in the US Western Interior ammonite scheme are defined with the first appearances of ammonites, Baculites obtusus and Didymoceras nebrascense, respectively (e.g., Cobban 1994;Cobban et al 2006; see also Ogg and Hinnov, 2012). Due to the endemic character of these ammonites, the biostratigraphic position of these boundaries in the European Campanian is interpreted with inoceramids (Walaszczyk et al 2001(Walaszczyk et al , 2002aOdin and Walaszczyk 2003;Walaszczyk 2004). Accordingly, the base of the middle Campanian lies within the 'I'.…”

Section: Stage and Substage Subdivisionmentioning

confidence: 99%

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

Jurkowska¹

2016

Acta Geologica Polonica

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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.

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Section: Inoceramid Biozonationmentioning

confidence: 99%

Section: Stage and Substage Subdivisionmentioning

confidence: 99%

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

Jurkowska¹

2016

Acta Geologica Polonica

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“…Its cor re la tion with the subchron C31r is not prob a ble. Inoceramids char ac ter iz ing the Dziurków succes sion are typ i cal of the lower half of the E. typica Zone; its upper part, char ac ter ized by "Inoceramus" incurvus (or re ferred to this zone; see Walaszczyk et al, 2001; see also Ogg and Hinnov, 2012: fig. 27.6), is not rep re sented.…”

Section: Discussionmentioning

confidence: 99%

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

Plasota

Nawrocki

Walaszczyk

2015

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The mag netic po lar i ties of the up per Up per Campanian-Lower Maastrichtian in ter val of the Mid dle Vistula River com pos ite sec tion (cen tral Po land), were stud ied. Sixty-six hand-ori ented sam ples for palaeomagnetic stud ies were taken from the sections of Raj, Raj North, Podole, K³udzie and Dziurków. The inter-cor re la tion be tween them is based pri mar ily on bio-events. The sam pled rocks gen er ally re vealed a very weak mag netic sig nal, how ever, quite re li able re sults were ob tained. The whole in ter val stud ied, well con strained biostratigraphically, is re ferred to magnetostratigraphic chron C32n. The Campanian/Maastrichtian bound ary, placed biostrati graphically in the up per part of the "Inoceramus" redbirdensis inoceramid Zone, is lo cated near the top of the C32n2n Subchron. Thin re versed po lar ity in ter vals in the rocks cor re lated with the C32n2n chron most prob a bly re sult from their par tial re mag net isa tion (maghemitisation).

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“…1). This area was described previously by Bishop (1967Bishop ( , 1973, Grier and Grier (1992, 2007, and Walaszczyk et al (2001). The specimen is from the layer designated as "scaphite concretions" by Bishop (1973), which occurs approximately 1 m below a distinctive 7.5-cm-thick bentonite.…”

Section: Localitiesmentioning

confidence: 99%

Encrustation of inarticulate brachiopods on scaphitid ammonites and inoceramid bivalves from the Upper Cretaceous U. S. Western Interior

Landman

Slattery

Harries

2016

Acta Geologica Polonica

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ABSTRACT:Landman, N.H., Slattery, J.S. and Harries, P.J. 2016. Encrustation of inarticulate brachiopods on scaphitid ammonites and inoceramid bivalves from the Upper Cretaceous U. S. Western Interior. Acta Geologica Polonica, 66 (4), 645-662.Warszawa.The inarticulate brachiopod Discinisca is a rare faunal element in the Upper Cretaceous of the U.S. Western Interior. We report two occurrences of encrustation of Discinisca on a scaphitid ammonite (scaphite) and several inoceramids from the lower Maastrichtian Baculites baculus/Endocostea typica Biozones of the Pierre Shale at two localities. Six specimens of Discinisca are present on a single specimen of Hoploscaphites crassus from eastcentral Montana. They occur along the furrow at the mature apertural margin. Because the brachiopods are restricted to the margin and do not occur on the rest of the shell, it is likely that they encrusted the ammonite during its lifetime. If so, this implies that the soft body of the scaphite did not cover the outside surface of the aperture, leaving this area vulnerable to epizoan attachment. A total of 13 specimens of Discinisca are also present on four specimens of Cataceramus? barabini from east-central Wyoming. The brachiopods occur in crevices on the outside of the shells and may have encrusted the inoceramids after their death as the shells began to break down and delaminate, resulting from the decomposition of the organic matrix holding them together. Based on the faunal assemblages at both localities, the presence of Discinisca may indicate environments with either low oxygen levels and/or few predators or competitors.

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Inoceramid bivalves and biostratigraphy of the upper Albian and lower Cenomanian of the United States Western Interior Basin

Cited by 22 publications

References 24 publications

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

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

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

Encrustation of inarticulate brachiopods on scaphitid ammonites and inoceramid bivalves from the Upper Cretaceous U. S. Western Interior

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