2022
DOI: 10.18814/epiiugs/2021/021022
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Abstract: Geological Sciences voted unanimously to ratify the Global Stratotype Section and Point (GSSP) proposal for the base of the Coniacian Stage of the Upper Cretaceous Series and Cretaceous System. The lower boundary of the Coniacian Stage is placed at the base of Bed 46 of the Salzgitter-Salder section in northern Germany. The boundary is defined by the first appearance of the inoceramid bivalve species Cremnoceramus deformis erectus (Meek) and complemented by the Navigation carbon isotope event. Additional data … Show more

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Cited by 5 publications
(2 citation statements)
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“…The Turonian/Coniacian boundary, ratified in May 2021 by the International Union of Geological Sciences (IUGS), is defined by the first appearance of the inoceramid bivalve species Cremnoceramus deformis erectus and complemented by the Navigation Carbon Isotope Event (Walaszczyk et al., 2021 ). In the stratotype section (Salzgitter‐Sadler, Germany) and in the auxiliary sections of the GSSP there are no reliable calcareous nannofossil biohorizons closely associated with the Turonian/Coniacian boundary, although the boundary lies within Zone CC13 (Jarvis et al., 2021 ; Lees, 2008 ; Sikora et al., 2004 ; Voigt et al., 2021 ; Walaszczyk et al., 2021 ). Accordingly, at Site U1513 the Turonian/Coniacian boundary is inferred to fall within Zone CC13 between the LO of Marthasterites furcatus at 185.61 m CCSF and the LO of Micula staurophora at 166.98 m CCSF.…”
Section: Calcareous Plankton Bioevents and Integrated Biostratigraphymentioning
confidence: 99%
“…The absence at Site U1513 of the planktonic foraminifera Dicarinella concavata , whose LO occurs slightly below the stage criterion in the auxiliary sections of the GSSP (Walaszczyk et al., 2021 ), prevents the precise identification of the base of the Coniacian Stage. Therefore, in this study the Turonian/Coniacian boundary is tentatively placed at the midpoint (169.92 m CCSF) between the HO of the planktonic foraminifera F. maslakovae (172.87 m CCSF) and the LO of the calcareous nannofossil M. staurophora , which defines the base of Zone CC14 Zone following correlations with the record from Tanzania and Exmouth Plateau (NW Australia, ODP Hole 762) where the two taxa are recorded in the same stratigraphic order (Huber et al., 2017 ).…”
Section: Calcareous Plankton Bioevents and Integrated Biostratigraphymentioning
confidence: 99%