Early Eocene benthic foraminifera of DSDP Hole 48-401 ...
Within the last decade, several early Eocene hyperthermals have been detected globally. These transient warming events have mainly been characterized geochemically - using stable isotopes, carbonate content measurements or XRF core scanning - yet detailed micropaleontological records are sparse, lim...
| Main Authors: | , , , |
|---|---|
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
PANGAEA
2012
|
| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.811249 https://doi.pangaea.de/10.1594/PANGAEA.811249 |
| Summary: | Within the last decade, several early Eocene hyperthermals have been detected globally. These transient warming events have mainly been characterized geochemically - using stable isotopes, carbonate content measurements or XRF core scanning - yet detailed micropaleontological records are sparse, limiting our understanding of the driving forces behind hyperthermals and of the contemporaneous paleoceanography. Here, detailed geochemical and quantitative benthic foraminiferal records are presented from lower Eocene pelagic sediments of Deep Sea Drilling Project Site 401 (Bay of Biscay, northeast Atlantic). In calcareous nannofossil zone NP11, several clay-enriched levels correspond to negative d13C and d18O bulk-rock excursions with amplitudes of up to ~0.75 per mil, suggesting that significant injections of 12C-enriched greenhouse gasses and small temperature rises took place. Coeval with several of these hyperthermal events, the benthic foraminiferal record reveals increased relative abundances of ... : Supplement to: D'haenens, Simon; Bornemann, André; Stassen, Peter; Speijer, Robert P (2012): Multiple early Eocene benthic foraminiferal assemblage and d13C fluctuations at DSDP Site 401 (Bay of Biscay - NE Atlantic). Marine Micropaleontology, 88-89, 15-35 ... |
|---|