Revision of the late/middle Miocene boundary on the Voering Plateau (ODP Leg104)

Müller, Carla; Spiegler, Dorothee

doi:10.1127/nos/28/1993/171

Cited by 14 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FO of Neogloboquadrina acostaensis was used by Spiegler and Jansen (1989) to indicate the middle/late Miocene boundary. In a later revision of the biostratigraphy of the Vøring Plateau, Spiegler and Müller (1992) and Müller and Spiegler (1993) equated the middle/late Miocene boundary to the boundary between calcareous nannofossil Zones NN8 and NN9 of Martini (1971) and Zones CN6 and CN7 of Okada and Bukry (1980). It also corresponds to the boundary between the Bolboforma laevis and B. subfragoris Zones (see also Spezzaferri and Spiegler, this volume).…”

Section: Pliocene-pleistocene Transitionmentioning

confidence: 99%

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

Spezzaferri¹

1998

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

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.

show abstract

Section: Pliocene-pleistocene Transitionmentioning

confidence: 99%

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

Spezzaferri¹

1998

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

show abstract

“…Ages to paleomagnetic events are assigned from Cande and Kent (1992), hence ages published for the Leg 104 Sites have been changed to match the Cande and Kent (1992) time scale (Table 1). In the interval 120-179 meters below seafloor (mbsf) in Hole 642C, we used the biostratigraphic ages from Müller and Spiegler (1993) (Table 1). Outside of the dated levels (magnetic reversal boundaries and biostratigraphic boundaries), we constructed time scales by linear interpolation, assuming constant sedimentation rates, except in the Brunhes chron where oxygen isotope Stages 1 to 21 were recognized in Holes 644A, 643A, and 907A.…”

Section: Methodsmentioning

confidence: 99%

“…However, only limited evidence exists for Northern Hemisphere glaciations of pre-Pliocene age, and the actual timing of the initiation of glaciation is still unknown. At the V0ring Plateau, the oldest pulses of glacial IRD are dated to -12.6 Ma (using the chronology of Müller and Spiegler, 1993), suggesting that glaciers first reach sea level at this time. The initiation of ice rafting coincides with a shift from extensive biogenic opal deposition to carbonate accumulation in the sediments, which may indicate the establishment of Atlantic inflow, deep convection which deepens the lysocline, and the intensification of North Atlantic Deep Water (NADW) production at 12.5 Ma (Wright and Miller, …”

Section: Neogene Northern Hemisphere Glacial History (125-1 Ma)mentioning

confidence: 99%

Late Neogene Paleoclimates and Paleoceanography in the Iceland-Norwegian Sea: Evidence from the Iceland and Vøring Plateaus

Fronval¹,

Jansen²

1996

Proceedings of the Ocean Drilling Program

138

View full text Add to dashboard Cite

Continuous late Neogene sediment sections from Site 907 on the Iceland Plateau and Sites 642, 643, and 644 on the V0ring Plateau were studied using stable isotope stratigraphy and sedimentological methods. Paleoclimatic and paleoceanographic changes have been placed in a time framework by using paleomagnetic reversals, biostratigraphic events, and isotope stratigraphic events as chronostratigraphic tools. The results show a general cooling of the Iceland-Norwegian Sea deep waters during the last 12 m.y., with major cooling events ~ll.O Ma and 6.4 Ma. At the V0ring Plateau, the oldest pulses of glacial icerafted debris (IRD) date to -12.6 Ma, indicating that glaciers reached sea level as early as the middle Miocene. The records of ice-borne deposits document a gradual intensification of glaciation from 7.2 to 6.0 Ma, which reflects the onset of small-scale glaciation in the Northern Hemisphere. The onset of large-scale Northern Hemisphere glaciation is dated at 2.75 Ma at the V0ring Plateau and 2.90 Ma at the Iceland Plateau, possibly reflecting different timing of growth of large-scale ice sheets in Greenland and Scandinavia. The middle Pleistocene climate shift (-0.9 Ma) is documented in both stable isotope stratigraphy and IRD deposition. The changes indicate a shift toward more extensive glacials of longer duration and the initiation of warmer interglacials with enhanced influx of Atlantic waters and ventilated deep waters. Within the Brunhes, deep-water formation apparently peaks during times of general climate deterioration and is not a linear response to global ice volume and sea-surface temperature. A general increase in planktonic 6 13 C -400 ka may reflect decreased global deep-sea carbonate preservation associated with the middle Brunhes climate transition.

show abstract

“…Its base has been considered latest Middle Miocene (Eidvin et al, 1999) and no older than 12 Ma . In well 24/12-1, recognition of a Bolboforma fragori assemblage at the base of the Utsira Sand (Eidvin et al, unpublished) gives an age of 11.7-10.3 Ma, based on the schemes of Müller and Spiegler (1993) and Spiegler and Müller (1992). Taking the base of the Utsira Sand at 11.7 Ma, and our mudstone drape samples at ca.…”

Section: Discussionmentioning

confidence: 98%

Palynological and foraminiferal biostratigraphy of (Upper Pliocene) Nordland Group mudstones at Sleipner, northern North Sea

Head

Riding

Eidvin³

et al. 2004

Marine and Petroleum Geology

View full text Add to dashboard Cite

Revision of the late/middle Miocene boundary on the Voering Plateau (ODP Leg104)

Cited by 14 publications

References 0 publications

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

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

Late Neogene Paleoclimates and Paleoceanography in the Iceland-Norwegian Sea: Evidence from the Iceland and Vøring Plateaus

Palynological and foraminiferal biostratigraphy of (Upper Pliocene) Nordland Group mudstones at Sleipner, northern North Sea

Contact Info

Product

Resources

About