Late Campanian-Maastrichtian Kamptnerius magnificus acme in the South Atlantic section of the Southern Ocean, ODP Holes 690C and 700B.

WISE, S; CONCHEYRO, A.; GUERRA, R. ; FAUTH, G.,

MICROPALEONTOLOGY

MICROPALEONTOLOGY PRESS

Lugar: New York; Año: 2016 vol. 62 p. 213 - 219

0026-2803

Coccolithophores are organisms with distribution largely controlled by temperature and availability of nutrients. For extinctcalcareous nannofossils there are some uncertainties in assigning ecological preferences of taxa, however sometimes species occurrencesexhibits striking high abundances showing clear preferences for certain environment, the so-called acme events. Duringquantitative analyses on samples from the South Atlantic section of the Southern Ocean (Holes 690C and 700B) a notable Kamptneriusmagnificus acmewas documented. This is the first time that such bioevent is described for the SouthAtlanticOcean. Preliminary analysisindicates that this event probably is related to the cooling in sea-surface temperatures during the Late Campanian-Maastrichtian.