Guernet, Claude; Danelian, Taniel (2006): Ostracodes bathyaux du Cretace terminal-Eocene moyen en Atlantique tropical (Plateau de Demerara, Leg 207) Bathyal Ostracoda of the uppermost Cretaceous to middle Eocene in the tropical Atlantic (Demerara Rise, Leg 207). Elsevier, Paris, France, In: Erbacher, Jochen (editor), Danelian, Taniel (editor), Nishi, Hiroshi (editor), Demerara Rise (ODP Leg 207); equatorial Cretaceous and Palaeogene stratigraphy and palaeoceanography; Part II, 49 (4), 215-225, georefid:2008-028064

Abstract:
Ostracode faunal assemblages which lived in bathyal environments are analysed from uppermost Maastrichtian-middle Eocene sediments of sites 1260 and 1261, drilled on the distal margin of Demerara, off Surinam (Leg 207, western tropical Atlantic). As for numerous other groups, the Cretaceous/Tertiary mass extinction event led to the disappearance of numerous bathyal ostracode species and it was followed by a very slow recovery during the Palaeocene. It appears that this extinction event was more devastating for detritus-feeder ostracode species than for filter or silt-eater groups, which crossed the K/T boundary without any or little morphological change. This extinction selectivity may be explained by the drop in productivity of surface waters which took place at the K/T boundary. Finally, psychrospheric ostracode species were encountered in Middle Eocene sediments, confirming thus the general cooling of deep oceanic realm recognised in general for this time interval.
Coverage:
West: -54.3300 East: -54.1900 North: 9.1600 South: 9.0300
Relations:
Expedition: 207
Site: 207-1260
Site: 207-1261
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.1016/j.revmic.2006.10.005 (c.f. for more detailed metadata)
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