↑De Danien-Selandienovergang wordt nauwkeurig beschreven door Arenillas et al. (2008) en Bernaola et al. (2009)
Literatuur
Arenillas, I.; Molina, E.; Ortiz, S. & Schmitz, B.; 2008: Foraminiferal and δ13C isotopic event-stratigraphy across the Danian-Selandian transition at Zumaya (northern Spain): chronostratigraphic implications, Terra Nova 20: pp 38-44.
Bernaola, G., Martín-Rubio, M. & Baceta, J.I., 2009: New high resolution calcareous nannofossil analysis across the Danian-Selandian transition at the Zumaia section: comparisons with South Tethys and Danish sections, Geologica Acta 7(1-2), pp 79-92.
(en) Gradstein, F.M.; Ogg, J.G.; Schmitz, M.D. & Ogg, G.M.; 2012: A Geologic Time Scale 2012, Elsevier, ISBN 0444594256.
(da) Rosenkrantz, A.; 1920: En ny københavnsk Lokalitet for forsteningsførende Paleocæn, Meddelelser fra Dansk Geologisk Forening 5, pp. 1–10 (gepubliceerd in 1921).
(da) Rosenkrantz, A.; 1924: De københavnske Grønsandslag og deres Placering i den danske Lagrække. Meddelelser fra Dansk Geologisk Forening 6, pp. 1–39.