(Table 1) Foraminifera abundance of ODP Hole 162-985A sediments

• Main Authors: Kaminski, Michael Anthony, Austin, William EN
• Format: Dataset
• Language: English
• Published: PANGAEA 1999
• Subjects: 162-985A; Adercotryma agterbergi; Ammodiscus cretaceus; Ammodiscus glabratus; Ammodiscus latus; Ammodiscus sp.; Ammolagena clavata; Ammosphaeroidina sp.; Bathysiphon sp.; Budashevaella multicamerata; Conotrochammina voeringensis; Counting; foraminifera; benthic; Cribrostomoides sp.; Cyclammina placenta; Cystammina sp.; DEPTH; sediment/rock; Discammina sp.; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eratidus sp.; Fossils; pyritized; Glomospira gordialis; Haplophragmoides eggeri; Haplophragmoides kirki; Haplophragmoides porrectus; Haplophragmoides sp.; Haplophragmoides stomatus; Haplophragmoides walteri; Hyperammina rugosa; Joides Resolution; Karreriella siegliei; Leg162; Norwegian Sea; Nothia robusta; Number; Ocean Drilling Program; ODP; Paratrochammina spp.; Psamminopelta gradsteini; Psammosphaera fusca; Recurvoides spp.; Reophax elongatus; Reophax nodulosus; Reophax spp.; Reticulophragmium acutidorsatum; Greenland; Greenland-Scotland Ridge; Iceland; Labrador Sea
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.805122; https://doi.org/10.1594/PANGAEA.805122

The stratigraphic distribution of deep-water agglutinated foraminifers was examined using 50 samples from Ocean Drilling Program (ODP) Hole 985A, drilled on the gentle slope of the Iceland Plateau in the Norwegian Basin. A total of 40 species and generic groupings was determined in this study. Three stratigraphically meaningful assemblages are recognized in Hole 985A: a basal assemblage with coarsely agglutinated forms (Cores 162-985A-62X through 50X), a Spirosigmoilinella compressa assemblage (Cores 162-985A-49X through 40X), and a sparse assemblage with pyritized radiolarians in the uppermost part of the studied interval (Cores 162-985A-39X through 32X). The whole succession from the base of Hole 985A to Core 162-985A-32X is here assigned to the Dorothia siegliei-Rotaliatina bulimoides Zone of Oligocene age. The stratigraphic ranges of several species extended into younger strata compared with biostratigraphic records from the Vøring Slope (ODP Hole 643A) and from an exploration well on the Vøring Plateau. Taxonomic differences between the foraminiferal records of the Norwegian Sea and the deep Labrador Sea provide evidence for faunal isolation of the deep Norwegian basin during the Oligocene. This isolation is attributed to limited marine connections across the Greenland-Scotland Ridge, resulting in Norwegian Sea deep water that was corrosive and poorly ventilated. Foraminiferal evidence suggests that Norwegian Sea deep water was poorly oxygenated during the Oligocene.