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

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-Pleistocen...

Full description

Bibliographic Details
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
Description
Summary: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 ...

Similar Items