Absolute Chronology of the Late Neogene Calcareous Nannofossil Succession in the Equatorial Pacific

Gartner, Stefan

doi:10.1130/0016-7606(1973)84<2021:acotln>2.0.co;2

Cited by 79 publications

(67 citation statements)

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“…Rio et al (1984) gave an age of 3.5 m.y. for this event and Gartner (1973) 3.2 m.y. It seems very difficult to distinguish different species of the genus Reticulofenestra in the light microscope by using only the size which is strongly controlled by ecological factors.…”

Section: Biostratigraphic Remarksmentioning

confidence: 77%

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Nannoplankton Biostratigraphy and Paleoenvironmental Interpretations from the Tyrrhenian Sea, ODP Leg 107 (Western Mediterranean)

Müller¹

1990

Proceedings of the Ocean Drilling Program

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This paper summarizes the nannoplankton biostratigraphy and the paleoenvironmental interpretations obtained from Leg 107 in the Tyrrhenian Sea. Marine sediments are ranging in age from late Tortonian to Recent.The Mediterranean as a semiclosed adjacent sea of the Atlantic is strongly controlled by paleoceanographic changes in the Atlantic which are related to the global climatic evolution. This influence of the Atlantic is more pronounced in the western than in the eastern Mediterranean. The occurrence of sapropels and sapropelic layers also in the western Mediterranean was shown for the first time.

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Section: Biostratigraphic Remarksmentioning

confidence: 77%

“…A more detailed subdivision of the lower Pleistocene (zone NN19) was possible by using the zonal scheme for the Quaternary by Gartner (1977). More details are given in Kastens, Mascle, et al (1987).…”

Section: Introductionmentioning

confidence: 99%

Nannoplankton Biostratigraphy and Paleoenvironmental Interpretations from the Tyrrhenian Sea, ODP Leg 107 (Western Mediterranean)

Müller¹

1990

Proceedings of the Ocean Drilling Program

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“…The stratigraphic position of the Kapitean stage had been recognized with predominantly boreal faunas (Hornibrook andEdwards, 1971, Kennett andWatkins, 1974;Edwards and Perch-Nielsen, 1974) and still remained to be calibrated accurately to European stages recognized with tropical and temperate faunas (Cita and Blow, 1969;Selli, 1960;Rio et al, 1976;Cita and Gartner, 1973;Gartner, 1973;Martini, 1971;Sprovieri, 1975;Stradner, 1973;Bukry, 1975).…”

Section: Specific Scientific Objectivesmentioning

confidence: 99%

Objectives, Principal Results, Operations, and Explanatory Notes of Leg 40, South Atlantic

Ryan¹,

Bolli²,

Foss³

et al. 1978

Initial Reports of the Deep Sea Drilling Project

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“…The highest and lowest occurrences (HOs and LOs) of the nannofossil species are at magnetostratigraphic levels that are similar to their levels at Site 519. It is noteworthy that the HO of Reticulofenestra pseudoumbilica here (at a level slightly below the Gauss/Gilbert boundary) is at almost exactly the same level as at Site 519 and that at Site 521 it is considerably lower than reported by Gartner (1973) from his study of Pacific piston cores.…”

Section: Biostratigraphy and Magnetostratigraphymentioning

confidence: 48%

Site 522

1984

Initial Reports of the Deep Sea Drilling Project

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Principal results: Holes 522, 522A, 522B-1. Recovered a complete magnetostratigraphic record for the sedimentary sequence from Quaternary to upper Eocene, or Chron C-16-R, Nannofossil Zone 20, and Foraminifer Zone CP 15b with the exception of the middle and late middle Miocene. The correlation between the magnetostratigraphy and seafloor anomalies is good for the Oligocene and upper Eocene section. The dissolution of the Paleogene fossils is moderate or slight. One of us (K.H.) believes the site should be recommended as a reference locality for the Oligocene magnetostratigraphy.2. Established the highest and lowest occurrences of numerous key foraminifer and nannofossil species useful in the zonation of the Oligocene and upper Eocene sediments.3. Obtained a magnetostratigraphic age of 37.1 m.y. for the nannofossil-dated Eocene/Oligocene boundary (on the basis of assuming a linear rate of seafloor spreading during the 66.5 m.y. of the Cenozoic).4. Established a precisely dated record of increasing dissolution during the Oligocene and of intense dissolution during the Miocene. SITE 5225. Confirmed the occurrence of Braarudosphaera chalk along the 30 °S parallel during the middle Oligocene (Chrons C-10-R and C-12-R), when Oceanographic conditions may have been unusual. 6. Confirmed the near synchroneity of the sediment and basement magnetization to support the previous practice of dating basalt basement on the basis of the paleontology of the oldest sediment.7. Sampled a 19-m sequence of fresh basalt for petrochemical studies.8. Measured the magnetization of sediment and basalt. Basalt magnetization indicates little latitudinal displacement of the site since the beginning of the Eocene; however, sediment magnetization indicates significant latitudinal displacement.9. Obtained two moderately good downhole temperature measurements and a low heat flow value (1.17 heat flow units) that suggests that ocean water is being drawn down into the topmost porous basalt basement. BACKGROUND AND OBJECTIVES

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Absolute Chronology of the Late Neogene Calcareous Nannofossil Succession in the Equatorial Pacific

Cited by 79 publications

References 0 publications

Nannoplankton Biostratigraphy and Paleoenvironmental Interpretations from the Tyrrhenian Sea, ODP Leg 107 (Western Mediterranean)

Nannoplankton Biostratigraphy and Paleoenvironmental Interpretations from the Tyrrhenian Sea, ODP Leg 107 (Western Mediterranean)

Objectives, Principal Results, Operations, and Explanatory Notes of Leg 40, South Atlantic

Site 522

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