A Stratigraphic Review of the Late Callovian to Oxfordian Interval, Fisher Bank Basin Area (Uk Sector, Central North Sea)

Abstract

* The Middle to Upper Jurassic succession of six wells in the Fisher

Organic-walled dinoflagellate cyst biostratigraphy of the upper Eocene to lower Oligocene Yazoo Formation, US Gulf Coast

“…The upper Eocene to lower Oligocene lithostratigraphy outlined above has been interpreted within two distinct sequence stratigraphic models. The first argues that the Yazoo-Bumpnose contact coincides with a maximum flooding surface throughout the region (Baum and Vail, 1988;Echols et al, 2003;Jaramillo and Oboh-Ikuenobe, 1999;Loutit et al, 1988;Mancini and Tew, 1991;Tew, 1992). The second, and more recent (Miller et al, 2008), supports the association of the Yazoo-Bumpnose contact (Dockery, 1982) with a low stand sequence boundary, which is linked to the increasing δ 18 O (Zachos et al, 2001(Zachos et al, , 1996(Zachos et al, , 2008 and global eustatic sea level fall (Coxall et al, 2005;Pekar et al, 2002) during the EOT.…”

“…A full species list is provided in Appendix 1. The rich and well-preserved dinocyst assemblages provide the basis for a detailed assessment of upper Eocene dinoflagellate biostratigraphy in this succession, which is developed with reference to dinocyst biostratigraphic data from offshore eastern Canada (Egger et al, 2016;Williams, 1975Williams, , 1977, the Gulf Coast Plain (Houben et al, 2018;Jaramillo and Oboh-Ikuenobe, 1999), offshore Florida (VanMourik et al, 2001), the Norwegian and Greenland seas (Eldrett et al, 2004;Manum, 1976;Manum et al, 1989;Williams and Manum, 1999), the North Sea Gradstein et al, 1992;Hansen, 1977;Heilmann-Clausen and Van Simaeys, 2005;Mudge and Bujak, 1996;Śliwińska et al, 2012), the Hampshire Basin (Costa et al, 1976), the central Mediterranean region (Brinkhuis, 1994;Brinkhuis and Biffi, 1993;Van Mourik and Brinkhuis, 2005;Wilpshaar et al, 1996), northwestern Europe (England, Belgium, and Germany; Costa and Downie, 1979;Kothe, 1990), the Tasmanian Gateway (Stickley et al, 2004), and the wider Northern Hemisphere (Williams, 1993). Although there have been studies of dinocyst biohorizons across the EOB interval in Gulf Coast sections from Alabama (e.g.…”

“…Dinocyst biostratigraphic studies thus need to consider comparable realms in similar climatic zones when selecting appropriate dinocyst bioevents (Williams and Bujak, 1985). There are existing dinocyst biostratigraphic studies of the Eocene-Oligocene from both the Northern Hemisphere (Brinkhuis and Biffi, 1993;Egger et al, 2016;Mudge and Bujak, 1994;Śliwińska et al, 2012;Thomsen et al, 2012;Wilpshaar et al, 1996) and the Southern Hemisphere (Bijl et al, 2018;Wilson, 1988). At the Massignano Eocene-Oligocene Global Stratotype Section and Point (GSSP), there are two successive influxes of cool-water high-latitude organic-walled dinoflagellate cyst (dinocyst) species (Brinkhuis and Biffi, 1993), the first of which correlates directly with the EOB and the second with the onset of a more severe cold episode and inferred sea level lowstand.…”