Late Early Cretaceous Radiolaria from Deep Sea Drilling Project Leg 62

Silva, André

doi:10.2973/dsdp.proc.62.112.1981

Cited by 46 publications

(39 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interval between Sample 123-765C-42R-3, 60-62 cm, and 123-765C-45R-5, 52-55 cm, yields abundant, moderately well-preserved radiolarian assemblages assignable to the lower Sethocapsa euganea Zone (Schaaf, 1985), indicating an early Aptian age. The highest reversed-polarity zone in the Lower Cretaceous of Hole 765C is a narrow, but clearly defined, event spanning only 43 cm in Section 123-765C-45R-2 (Ogg et al, this volume).…”

Section: M1r-m3rmentioning

confidence: 95%

“…Schaaf, 1981Mutterlose, this vol. Shaaf, 1985Schaaf, 1981Thierstein, 1971Bralower, 1987Bralower, 1987Mutterlose, this vol. Bralower, 1987Mutterlose, this vol.…”

Section: Upper Cretaceousmentioning

confidence: 98%

“…Ages were based on an integration of radiolarian ranges proposed by , Schaaf (1981Schaaf ( , 1985, Pessagno (1977), and Aita (1987). The lowermost Cretaceous was zoned after Baumgartner (1984Baumgartner ( , 1987.…”

Section: Radiolariansmentioning

confidence: 99%

See 2 more Smart Citations

Magnetobiostratigraphic Synthesis of Leg 123: Sites 765 and 766 (Argo Abyssal Plain and Lower Exmouth Plateau)

Kaminski¹,

Baumgartner²,

Bown³

et al. 1992

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

During ODP Leg 123, Sites 765 and 766 were drilled to examine the tectonic evolution, sedimentary history, and paleoceanography of the Argo Abyssal Plain and lower Exmouth Plateau. At each site, the quality of magnetostratigraphic and biostratigraphic records varies because of complicating factors, such as the predominance of turbidites, the presence of condensed horizons, or deposition beneath the CCD.Based primarily on the presence of nannofossils, the base of the sedimentary section at Site 765 was dated as Tithonian. A complete Cretaceous sequence was recovered at this site, although the sedimentation rate varies markedly through the section. The Cretaceous/Tertiary boundary is represented by a condensed horizon. The condensed Cenozoic sequence at Site 765 extends from the upper Paleocene to the lower Miocene. A dramatic increase in sedimentation rate was observed in the lower Miocene, and a 480-m-thick Neogene section is present. The Neogene section is continuous, except for a minor hiatus in the lower Pliocene.The base of the sedimentary section at Site 766 is Valanginian, in agreement with the site's position on marine magnetic anomaly Mil. Valanginian to Barremian sediments are terrigenous, with variable preservation of microfossils, and younger sediments are pelagic, with abundant well-preserved microfossils. Sedimentation rate is highest in the Lower Cretaceous and decreases continually upsection. Upper Cenozoic sediments are condensed, with several hiatuses.

show abstract

Section: M1r-m3rmentioning

confidence: 95%

“…Schaaf, 1981Mutterlose, this vol. Shaaf, 1985Schaaf, 1981Thierstein, 1971Bralower, 1987Bralower, 1987Mutterlose, this vol. Bralower, 1987Mutterlose, this vol.…”

Section: Upper Cretaceousmentioning

confidence: 98%

See 1 more Smart Citation

Magnetobiostratigraphic Synthesis of Leg 123: Sites 765 and 766 (Argo Abyssal Plain and Lower Exmouth Plateau)

Kaminski¹,

Baumgartner²,

Bown³

et al. 1992

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

show abstract

“…2), are considered to be stratigraphically the most significant for Cretaceous radiolarian fauna recovered during Leg 130. They are unambiguously assigned to the early Aptian (Sanfilippo and Riedel, 1985;Schaaf, 1985;Thurow, 1988), although zonal assignment cannot be achieved. This age assignment is based on the presence of Stichocapsa euganea and Thanarla praeveneta, coupled with the absence of T. veneta and Pseudodictyomitra pseudomacrocephala (Table 1).…”

Section: Hole 807cmentioning

confidence: 99%

Cretaceous Radiolarians from the Ontong Java Plateau, Western Pacific, Holes 803D and 807C

Takahashi

Ling²

1993

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

Among the five sites drilled during Ocean Drilling Program Leg 130, two deep holes (8O3D and 807C) penetrated Cretaceous sediments overlying the basaltic pillows, flows, and possibly basement rocks. Abundant, poorly preserved radiolarians with limited diversity were recovered from a few horizons within the sediments proximal to the basalt. At Site 803, three thin layers of radiolarites interbedded with claystone and clayey siltstone yielded radiolarian assemblages of late Albian age. At Site 807, several layers of radiolarian siltstones were recovered proximal to the basalt. Among them the most significant radiolarian assemblage is an Aptian fauna, located approximately 7 m above the basaltic flows. The Aptian radiolarian age for Site 807 is at least in accord with those suggested by planktonic foraminifer and paleomagnetic evidence. These Cretaceous radiolarians are the oldest assemblages recorded from the Ontong Java Plateau region.

show abstract

“…This report uses the Cretaceous biozonation proposed by ranges from onshore upper Cretaceous sections were taken from Pessagno (1976), Taketani (1982), and Yamasaki (1987). Faunal data from other lower Cretaceous sections were taken from Schaaf (1981Schaaf ( , 1984, Baumgartner (1984), and Aita (1987).…”

Section: Zonationmentioning

confidence: 99%

Explanatory Notes

1990

Proceedings of the Ocean Drilling Program

View full text Add to dashboard Cite

Late Early Cretaceous Radiolaria from Deep Sea Drilling Project Leg 62

Cited by 46 publications

References 7 publications

Magnetobiostratigraphic Synthesis of Leg 123: Sites 765 and 766 (Argo Abyssal Plain and Lower Exmouth Plateau)

Magnetobiostratigraphic Synthesis of Leg 123: Sites 765 and 766 (Argo Abyssal Plain and Lower Exmouth Plateau)

Cretaceous Radiolarians from the Ontong Java Plateau, Western Pacific, Holes 803D and 807C

Explanatory Notes

Contact Info

Product

Resources

About