Planktonic Foraminifer Biostratigraphy of Norwegian Sea Sediments: ODP Leg 104

Spiegler, Dorothee; Jansen, Eystein

doi:10.2973/odp.proc.sr.104.157.1989

Cited by 36 publications

(59 citation statements)

References 15 publications

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“…same problems with barren intervals and sparse, non-age-diagnostic assemblages as were found on DSDP Leg 38 (e.g., Donnally, 1989;Spiegler and Jansen, 1989). Agglutinated benthic foraminifer assemblages occur in Leg 104 sites, but with only broad stratigraphic control (Osterman and Qvale, 1989).…”

Section: -913b-mentioning

confidence: 68%

Upper Middle Eocene to Oligocene Dinoflagellate Biostratigraphy and Assemblage Variations in Hole 913B, Greenland Sea

Firth¹

1996

Proceedings of the Ocean Drilling Program

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Two peaks in these genera coincide with the diatom-and radiolarian-rich biosiliceous oozes between 464 and 500 mbsf. These peaks may be interpreted as possibly reflecting high paleoproductivity events, and they are used to infer at least two other possible episodes of high paleoproductivity centered around 540 and 570 mbsf (middle to upper Eocene) in sediments wherein primary biosilica has been mostly removed or altered by diagenesis.

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Section: -913b-mentioning

confidence: 68%

Upper Middle Eocene to Oligocene Dinoflagellate Biostratigraphy and Assemblage Variations in Hole 913B, Greenland Sea

Firth¹

1996

Proceedings of the Ocean Drilling Program

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“…The zonation of Spiegler and Jansen (1989) is applied to the high latitude Quaternary-Pliocene assemblages. The zonations of Blow (1969Blow ( , 1979 and Spezzaferri (1994b) are applied to the Miocene and Eocene, and Oligocene and early Miocene faunas, respectively.…”

Section: Planktonic Foraminifer Biostratigraphymentioning

confidence: 99%

“…However, since most of the Oligocene and Miocene markers are missing, zonal attribution is often based on the entire assemblage and/or second order events, rather than on the first and last occurrence and/or presence of markers. Figures 2 and 3 show the main bioevents identified in this study, together with those of Spiegler and Jansen (1989) and some of the standard bioevents used to mark zonal boundaries at low and middle latitudes (Blow, 1979, with modification from Spezzaferri, 1994b;and Premoli Silva, pers. comm., 1995).…”

Section: Planktonic Foraminifer Biostratigraphymentioning

confidence: 99%

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Planktonic foraminifer biostratigraphy and paleoenvironmental implications of Leg 152 sites (East Greenland Margin)

Spezzaferri¹

1998

Proceedings of the Ocean Drilling Program

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Five sites and eight holes drilled on the East Greenland Margin during Ocean Drilling Program Leg 152 recovered Quaternary to middle Eocene sediments. Planktonic foraminiferal assemblages display generally low diversity; abundance and preservation varies from layer to layer. Several intervals devoid of planktonic foraminifers were identified in middle Miocene through Pliocene, lower upper Oligocene, and Eocene sediments. The more complete sedimentary sequence recovered at Site 918 spans the interval from the Quaternary to the middle Eocene. However, a major hiatus is recorded in the interval that spans the upper Eocene and the lower Oligocene. Two minor hiatuses occur in the lowermost Miocene and probably in the upper part of the middle Miocene, respectively.Paleoclimatic interpretations based on species diversity, changes in assemblages, and comparison with the stable isotope record indicate that several alternating glacial-interglacial episodes occurred during the Pliocene and the Quaternary. These t wo intervals are, however, separated by a warmer episode in the early Pliocene. Cool conditions and glacial episodes also prevailed in the late Miocene, whereas a slight warming probably occurred in the middle Miocene. This period was, however, cooler than the late Oligocene, the early Miocene, and the middle Eocene. These latter intervals were characterized by a warmer climate as indicated by the presence of several warmer water taxa. The first occurrence of Neogloboquadrina pachyderma and the changes in coiling direction of Neogloboquadrina atlantica are also climatically controlled.Comparison with previously drilled sites in the same area indicates that the short early Miocene hiatus and part of the hiatus spanning the late middle Eocene and the early Oligocene identified in Hole 918D may have interregional extensions in the North Atlantic Ocean.

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“…Instead, comparisons were made with the regional biostratigraphy established at ODP sites in the Norwegian-Greenland Sea (Spiegler and Jansen, 1989;Spiegler, 1996) that make use of local planktonic foraminiferal first and last occurrences, coiling changes in Neogloboquadrina, and the biostratigraphic zona-…”

Section: Planktonic Foraminifersmentioning

confidence: 99%

Methods

2006

Proceedings of the IODP 302

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Planktonic Foraminifer Biostratigraphy of Norwegian Sea Sediments: ODP Leg 104

Cited by 36 publications

References 15 publications

Upper Middle Eocene to Oligocene Dinoflagellate Biostratigraphy and Assemblage Variations in Hole 913B, Greenland Sea

Upper Middle Eocene to Oligocene Dinoflagellate Biostratigraphy and Assemblage Variations in Hole 913B, Greenland Sea

Planktonic foraminifer biostratigraphy and paleoenvironmental implications of Leg 152 sites (East Greenland Margin)

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