Essai de zonation du Crétacé méditerranéen à l'aide des foraminifères planctoniques

Sigal, Jacques

doi:10.3406/geolm.1977.997

Cited by 117 publications

(75 citation statements)

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“…The ages of the early Aptian and Barremian events, however, remain speculative. Previously, in terms of microfossils, the Barremian/Aptian boundary was defined by the first appearance of the planktonic foraminifer Hedbergella similis and the calcareous nannofossils Rucinolithus irregularis and Chiastozygus litterarius following the zonations of Sigal (1977) and Thierstein (1973), respectively. The Hedbergella similis Zone was followed by the first occurrence (FO) of the planktonic foraminifer genus Globigerinelloides in the G. duboisi Zone and G. blowi in the succeeding G. blowi Zone, as shown in Figure 2.…”

Section: Biochronology and Geochronologymentioning

confidence: 99%

Cretaceous Planktonic Foraminifers and Depositional Environments from the Ontong Java Plateau with Emphasis on Sites 803 and 807

Sliter¹,

Leckie²

1993

Proceedings of the Ocean Drilling Program

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Cretaceous planktonic foraminifers from Ocean Drilling Program (ODP) Leg 130 consist of two age groups: one dominantly Aptian in age and the other dominantly Maastrichtian. The oldest dated sediments from Ontong Java Plateau occur at ODP Site 807 and are assigned to the early Aptian Globigerinelloides blowi Zone. The assemblage correlates closely with Aptian foraminifers from Deep Sea Drilling Project (DSDP) Site 289 and a younger Aptian assemblage from DSDP Site 288 where drilling ended before reaching basement. Planktonic foraminifers from ODP Site 803 suggest a late Aptian to early Albian age and are overlain by radiolarians of late Albian age. These ages are in conflict with a radiometric age of about 90 Ma for basement at the site. The dominantly Maastrichtian group occurs at Site 807 and consists of poorly preserved, mostly small-sized specimens that range in age from perhaps the latest Campanian to the Cretaceous/Tertiary boundary. Age assignments are made difficult by pervasive dissolution and resedimentation that extends into the Paleogene.Deposition of the Aptian limestone at Site 807 took place at lower bathyal depths beneath the foraminiferal lysocline but above the calcite compensation depth (CCD). Deposition then continued beneath the CCD until the late Campanian or Maastrichtian when carbonate sedimentation resumed. Within the Maastrichtian, deposition again took place at lower bathyal depths at or above the rapidly dropping CCD until the Cretaceous/Tertiary boundary when the CCD apparently rose. Small planktonic foraminifers accumulated in winnowed and redeposited fine-grained sediments whereas larger planktonic foraminifers were deposited largely in mass-flow deposits that increase in number upsection through the Maastrichtian. The increased pulses of larger planktonic foraminifers followed by the abrupt occurrence of laminated sediments, an abundance of small, globular planktonic foraminifers, and an increase in radiolarians in the latest Maastrichtian likely were the result of northward plate motion into more productive waters and different current systems. At Site 803, deposition beneath the CCD continued from the earliest sediments above the basalt until the Eocene. Carbonate sedimentation during the late Albian to early Santonian, however, is recorded atop the plateau at Site 288.The extensive hiatuses in the Cretaceous sequence from the Ontong Java Plateau correlate in part with times of widespread hiatuses in the Pacific Basin. Evidence of pervasive mechanical erosion during the Cenomanian to Santonian and the Campanian to Maastrichtian on the top of the plateau perhaps were caused by the longitudinal position of the plateau relative to western boundary currents and eddy effects above the plateau.

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Section: Biochronology and Geochronologymentioning

confidence: 99%

Cretaceous Planktonic Foraminifers and Depositional Environments from the Ontong Java Plateau with Emphasis on Sites 803 and 807

Sliter¹,

Leckie²

1993

Proceedings of the Ocean Drilling Program

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“…The abundance and diversity of the Albian and Vraconnian faunas of Madagascar was made known by the works of COLLIGNON for ammonites (1928-1929, 1932, 1963, 1965b, 1978b) and by those of SIGAL (1977SIGAL ( , 1987 and COLLIGNON et alii (1979) for planktonic foraminifera and ostracodes. As for stratigraphy, it was synthesized in a memoir by BESAIRIE (1972).…”

Section: The Vraconnian In the Diégo Well (Madagascar)mentioning

confidence: 99%

“…It would modify the relationship between foraminiferal and ammonite zones, for the base of the Vraconnian would no longer coincide with the base of the Rotalipora appenninica Zone (SIGAL, 1977(SIGAL, , 1987ROBASZYNSKI & CARON, 1979) but would coincide with the base of the Rotalipora subticinensis Zone (CARON in PARIZE et alii, 1998).…”

Section: Remarksmentioning

confidence: 99%

“…For more than a half-century the fauna of ammonites and foraminifera have been the subject of reports and specific collections from scattered outcrops ("localities") (ANDERSON, 1938(ANDERSON, , 1958MURPHY, 1956;POPENOE et alii, 1960;MURPHY & RODDA, 1960;MURPHY et alii, 1964MURPHY et alii, , 1969MARIANOS & ZINGULA, 1996). All of these studies have provided an overall view of the Albian to Turonian stages on a regional scale but with no If the Vraconnian is defined using foraminifera as being the interval between the appearance of Rotalipora appenninica and that of Rotalipora globotruncanoides (= R. brotzeni), the position adopted by SIGAL (1977SIGAL ( , 1987 and by the European working group on planktonic foraminifera (ROBASZYNSKI & CARON, 1979), 108 m of the Vraconnian stage were drilled through in the Diégo well, between the depths of 23 and 131 m. As in central Tunisia, the Vraconnian is very thick in the Diégo well. • the upper part of the Upper Chickabally Member consisting of silts interbedded with pluri-decimetric sandstone beds;…”

Section: The Vraconnian At Dry Creek (California Usa)mentioning

confidence: 99%

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Support for a Vraconnian Stage between the Albian sensu stricto and the Cenomanian (Cretaceous System)

Amédro¹

2008

Carnets De Géologie (Notebooks on Geology)

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“…Cenozoic planktonic foraminiferal age determinations are based on a combination of the biostratigraphic schemes of Blow (1969), Bolli (1966), Cita (1973), and Hardenbol and Berggren (1978). The Cretaceous sediments are biostratigraphically subdivided following a composite zonation after Sigal (1977) and Premoli Silva and Sliter (1981). The biostratigraphic zonation of Remane (1978) is followed for calpionellids.…”

Section: Biostratigraphic Frameworkmentioning

confidence: 99%

Introduction and Explanatory Notes

Buffler¹,

Schlager²,

Pisciotto³

1984

Initial Reports of the Deep Sea Drilling Project

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Essai de zonation du Crétacé méditerranéen à l'aide des foraminifères planctoniques

Cited by 117 publications

References 0 publications

Cretaceous Planktonic Foraminifers and Depositional Environments from the Ontong Java Plateau with Emphasis on Sites 803 and 807

Cretaceous Planktonic Foraminifers and Depositional Environments from the Ontong Java Plateau with Emphasis on Sites 803 and 807

Support for a Vraconnian Stage between the Albian sensu stricto and the Cenomanian (Cretaceous System)

Introduction and Explanatory Notes

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