West Atlantic abyssal circulation during the past 120,000 years

Schnitker, Detmar

doi:10.1038/248385a0

Cited by 241 publications

(105 citation statements)

References 4 publications

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100

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“…This suggestion is strengthened by the first appearance of Uvigerina which occurs at the first period of major cooling in the early Miocene (Figure 7). This result is similar to that of Schnitker (1974) who uses benthonic foraminiferal populations to reconstruct circulation changes of the North Atlantic. Species diversity is indicated on Figure 2 by horizontal bars and the diversity field is given in Figure 5.…”

Section: Fluctuation Trends Andsupporting

confidence: 73%

“…This was shown in the Baltic Sea where shallow shelf species submerge with inflowing high salinity water into the deep basins (Lutze, 1965). It was recently demonstrated by Schnitker (1974) for the bathyal West Atlantic and by Douglas (1975). It does not seem justified, therefore, to interpret minor bathyal faunal changes as a result of epirogenetic uplift and subsidence or sea-level changes.…”

Section: Paleobathymetrymentioning

confidence: 99%

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Neogene Benthonic Foraminifera from Site 369, Leg 41, Deep Sea Drilling Project

Lutze¹

1978

Initial Reports of the Deep Sea Drilling Project

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A statistical study of late Neogene benthonic Foraminifera reveals relatively low faunal fluctuation, as compared with the glacial Pleistocene. A Uvigerina maximum is correlated with a cooling trend indicated by the planktonic fauna and is believed to reflect changes in bottom water conditions. In addition, the ranges of main benthonic species were established down to the Oligocene boundary. Displaced shelf faunas in the upper early Miocene indicate downslope sediment transport. Selective dissolution, the occurrence of Uvigerina, and upslope migration of Melonis pompilioides characterize the cooling period of the lower early Miocene.

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Section: Fluctuation Trends Andsupporting

confidence: 73%

Section: Paleobathymetrymentioning

confidence: 99%

Neogene Benthonic Foraminifera from Site 369, Leg 41, Deep Sea Drilling Project

Lutze¹

1978

Initial Reports of the Deep Sea Drilling Project

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“…The general correlation between the benthic fluctuation (WBF-curve) and shifts of the planktonic foraminiferal curves support the theory that climatically induced changes in the surface-water regime are associated with drastic changes in the Atlantic deep water circulation (Streeter, 1973;Schnitker, 1974). However, the reduced degree of correlation during Stage 3 may indicate that smaller changes in the surface waters are not always paralleled by equivalent shifts of the benthic foraminiferal population and the bottom-water conditions.…”

Section: Deep-water Record Of Benthic Foraminifersmentioning

confidence: 69%

Meteor Cores 12309: Late Pleistocene Reference Section for Interpretation of the Neogene of Site 397

Lutze¹,

Sarnthein²,

Koopman³

et al. 1979

Initial Reports of the Deep Sea Drilling Project

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“…Numerous studies have shown that benthic foraminifers are valuable depth and water mass indicators (Bandy, 1953a;1953b;Streeter, 1973;Schnitker, 1974;Pflum et al, 1976;Lohmann, 1978). Seven CaCO 3 spikes were sampled for benthic foraminiferal species identification.…”

Section: Benthic Foraminiferal Assemblagesmentioning

confidence: 99%

Carbonate Spikes and Displaced Components at Deep Sea Drilling Project Site 515: Pliocene/Pleistocene Depositional Processes in the Southern Brazil Basin

Shor¹,

Jones²,

Rasmussen³

et al. 1983

Initial Reports of the Deep Sea Drilling Project, 72

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Late Pliocene to Recent sediments from the southern Brazil Basin (DSDP Hole 515A, hydraulic piston core) were analyzed for evidence of episodic flow of Antarctic Bottom Water (AABW) through the Vema Channel. Carbonate-enriched layers punctuate the post-Pliocene section, otherwise composed predominantly of terrigenous silt and clay. Carbonate enrichment is thought to result from rapid deposition of fine-grained calcareous turbidites, originating in canyons incised on the northern margin of the Rio Grande Rise. The composition of benthic foraminiferal assemblages and the presence of stratigraphically displaced discoasters is consistent with a turbidite origin. Based on the presence of displaced Antarctic diatoms, AABW flow through the Vema Channel apparently has had a major influence on this site for only four periods during the last 2.7 Ma (about 45 to 250; 375 to 430; 700 to 780; 1320 to 1345 thousand yr. ago).

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West Atlantic abyssal circulation during the past 120,000 years

Cited by 241 publications

References 4 publications

Neogene Benthonic Foraminifera from Site 369, Leg 41, Deep Sea Drilling Project

Neogene Benthonic Foraminifera from Site 369, Leg 41, Deep Sea Drilling Project

Meteor Cores 12309: Late Pleistocene Reference Section for Interpretation of the Neogene of Site 397

Carbonate Spikes and Displaced Components at Deep Sea Drilling Project Site 515: Pliocene/Pleistocene Depositional Processes in the Southern Brazil Basin

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