The Cretaceous–Paleogene (K/Pg) boundary in the Dababiya Borehole, southern Egypt: An organic-walled dinoflagellate cyst approach

Late Maastrichtian to Danian organic-walled dinoflagellate cysts and calcareous nannofossils from eastern Austral Basin, Patagonia, Argentina

“…Senoniasphaera inornata occurs in samples from 965-970 to 985-990 in the SRC borehole. The biocron of this species is restricted to the early and middle Danian (64.95-62.60 Ma; e.g., Williams et al, 2004;Slimani et al, 2010Slimani et al, , 2016Crouch et al, 2014;Guédé et al, 2014;Vellekoop et al, 2015Vellekoop et al, , 2017aAçıkalın et al, 2015;Woelders et al, 2017;Soliman and Slimani, 2019;Chakir et al, 2020;Jbari et al, 2020). In New Zealand, the HO of S. inornata defined the top of the NZDP3 zone (Crouch et al, 2014) Palaeoperidinium pyrophorum appears in samples from 965-970 to 985-990 mbgs in the SRC borehole, and has its LO in the early Danian (e.g., Askin, 1988a, b;Brinkhuis et al, 2003;Bowman et al, 2016) and the HO is mostly recorded associated with the Selandian-Thanetian boundary, or in the basal Thanetian (e.g., Bujak and Brinkhuis, 1998;Crouch et al, 2001;Williams et al, 2004;Bijl et al, 2013).…”