Benthic foraminifera groups of ODP Site 162-982 ...

• Main Authors: Kawagata, Shungo, Hayward, Bruce William, Grenfell, Hugh R, Sabaa, Ashwaq T
• Format: Dataset
• Language: English
• Published: PANGAEA 2005
• Subjects: Sample code/label; DEPTH, sediment/rock; Depth, composite; Sample mass; Sand, mass netto; Sand; Density, grain; Fragmentation index; Foraminifera, benthic extinction group; Accumulation rate, benthic foraminifera extinction group by number; Foraminifera, benthic low oxygen group; Accumulation rate, benthic foraminifera low oxygen group by number; Foraminifera, benthic opportunistic group; Accumulation rate, benthic foraminifera opportunistic group by number; Number of species; Foraminifera, benthic; Accumulation rate, benthic foraminifera by number; Ice rafted debris; Composite Core; DSDP/ODP/IODP sample designation; Intercore correlation; Counting >63 µm fraction; Leg162; Joides Resolution; Ocean Drilling Program ODP; Hayward; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.774885; https://doi.pangaea.de/10.1594/PANGAEA.774885

The pulsed decline and eventual extinction of 51 species of elongate, cylindrical deep-sea benthic foraminifera (Stilostomellidae, Pleurostomellidae, and some Nodosariidae) occurred at intermediate water depths (1145–2168 m, Sites 980 and 982) in the northern North Atlantic during the mid-Pleistocene transition (MPT, 1.2–0.6 Ma). In the early Pleistocene, prior to their disappearance, these species comprised up to 20% of the total abundance of the benthic foraminiferal assemblage at 2168 m, but up to only 2% at 1145 m. The MPT extinction of 51 species represents ?20% of the total benthic foraminiferal diversity at bathyal depths in the North Atlantic (excluding the myriad of small unilocular forms). The extinction rate during the MPT was approximately 10 species per 0.1 myr, being one or two orders of magnitude greater than normal background turnover rates of deep-sea benthic foraminifera. Comparison of the precise timings of declines and disappearances (= highest occurrences) of each species shows that they ... : Supplement to: Kawagata, Shungo; Hayward, Bruce William; Grenfell, Hugh R; Sabaa, Ashwaq T (2005): Mid-Pleistocene extinction of deep-sea foraminifera in the North Atlantic Gateway (ODP sites 980 and 982). Palaeogeography, Palaeoclimatology, Palaeoecology, 221(3-4), 267-291 ...