(Table S1, S4) Campanian-Maastrichtian benthic foraminifera from ODP Hole 113-690C ...

• Main Authors: Koch, Mirjam C, Friedrich, Oliver
• Format: Dataset
• Language: English
• Published: PANGAEA 2012
• Subjects: Sample code/label; DEPTH, sediment/rock; AGE; Alabamina sp.; Allomorphina cf. navarroana; Allomorphina trochoides; Allomorphina sp.; Allomorphina minuta; Angulogavelinella sp.; Aragonia velascoensis; Arenobulimina preslii; Arenobulimina sp.; Astacolus cretaceus; Astacolus sp.; Ataxophragmium rimosum; Biedafranciszkina polonica; Bolivina incrassata; Bolivina witwickae; Bolivina sp.; Bolivinoides paleocenicus; Bulimina sp.; Buliminella cf. excavata; Chrysalogonium tenuistriatum; Cibicides cf. excavata; Cibicidoides bembix; Cibicidoides velascoensis; Cibicidoides voltzianus; Cibicidoides sp.; Cuneus minutus; Cuneus trigona; Dentalina sulcata; Dentalina sp.; Dorothia oxycona; Dorothia pupa; Ellipsoidella variabilis; Ellipsoidella gracillima; Ellipsoidella kugleri; Ellipsoidella polonica; Ellipsoidella pleurostomelloides; Ellipsoidella sp.; Ellipsodimorphina hrubieszowcensis; Ellipsodimorphina variabilis; Ellipsodimorphina sp.; Epistominella alata; Eponides beisseli; Eponides concinna; Eponides sp.; Fissurina laticarinata; Fissurina orbignyana; Fissurina sp.; Antarc*; Antarctic; Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.825712; https://doi.pangaea.de/10.1594/PANGAEA.825712

During the latest Cretaceous cooling phase, a positive shift in benthic foraminiferal d18O values lasting about 1.5 Myr (71.5-70 Ma) can be observed at a global scale (Campanian-Maastrichtian Boundary Event, CMBE). This d18O excursion is interpreted as being influenced by a change in intermediate- to deep-water circulation or by temporal build-up of Antarctic ice sheets. Here we test whether benthic foraminiferal assemblages from a southern high-latitudinal site near Antarctica (ODP Site 690) are influenced by the CMBE. If the d18O transition reflects a change in intermediate- to deep-water circulation from low-latitude to high-latitude water masses, then this change would result in cooler temperatures, higher oxygen concentration, and possibly lower organic-matter flux at the seafloor, resulting in a major benthic foraminiferal assemblage change. If, however, the d18O transition was mainly triggered by ice formation, no considerable compositional difference in benthic foraminiferal assemblages would be ... : Sediment depth is given in mbsf. Age based on the age model of Voigt et al (2012). ...