Calcareous nannofossils and Milankovitch cycles: the example of the Albian Gault Clay Formation (southern England)

Erba, Elisabetta; Castradori, Davide; Guasti, Guido; Ripepe, Maurizio

doi:10.1016/0031-0182(92)90183-6

Cited by 189 publications

(84 citation statements)

References 20 publications

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“…3, 4) and precisely coincides with the negative δ 18 O bulk excursion, thus supporting the warming indicated by this proxy and the Tethyan ammonite influx. Similar trends in R. parvidentatum abundance from other Gault Clay sections in southern England support the regional decline in this taxon (Crux, 1991;Erba et al, 1992). In addition to the palaeotemperature indications from the nannofossil assemblages, we are also able to make inferences on surface water productivity.…”

Section: Nannofossil Surface Water Palaeoenvironmental Indicatorssupporting

confidence: 74%

“…3). The age of the Gault Clay is reported as middle to late Albian (Owen, 1971(Owen, , 1975Erba et al, 1992;Gale and Owen, 2010). The succession comprises dark to medium grey, fossiliferous, and silty clays interspersed with numerous phosphatic concretions, which are scattered throughout the clay and concentrated on erosional surfaces as thin lags of reworked debris.…”

Section: Methodsmentioning

confidence: 99%

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A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England

Kanungo

Bown

Young

et al. 2018

J. Micropalaeontol.

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Abstract. This paper documents a warming event across the middle-upper Albian interval in a ∼ 22 m long section from the Gault Clay Formation of Copt Point, Folkestone (UK). Evidence for the event comes from three independent datasets: calcareous nannofossils, ammonites, and the bulk sediment carbon and oxygen stable isotope record, which collectively indicate a brief period (∼ 500 kyr) of significant surface water warming (in excess of 6 • C) at around 107.5 Ma (the base of the Dipoloceras cristatum Ammonite Zone). A surface water productivity increase based on high percentages of the eutrophic nannofossil Zeugrhabdotus noeliae is found to be concomitant with this warming event, suggesting that surface waters were nutrient-rich and the warming was associated with increased precipitation and run-off, delivering more nutrients into the basin.

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Section: Nannofossil Surface Water Palaeoenvironmental Indicatorssupporting

confidence: 74%

Section: Methodsmentioning

confidence: 99%

A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England

Kanungo

Bown

Young

et al. 2018

J. Micropalaeontol.

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show abstract

“…Previous studies have indicated the strong affinity of Biscutum spp. for areas of elevated surface water fertility during the mid-Cretaceous (Roth and Bowdler, 1981;Roth, 1986, Erba et al, 1992Premoli Silva et al, 1989;Watkins, 1989). Similarly, the bridge zygodiscids (including Zeugrhabdotus) exhibited a strong affinity for high surface water fertility during this part of the Cretaceous (Roth and Bowdler, 1981;Roth, 1986;Watkins, 1989).…”

Section: Site 962mentioning

confidence: 97%

Calcareous nannofossils from the Cretaceous of the Deep Ivorian Basin

Watkins¹,

Shafik²,

Shin³

1998

Proceedings of the Ocean Drilling Program, 159 Scientific Results

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Micropaleontological investigation of four sites drilled by Ocean Drilling Program Leg 159 on the Côte d'Ivoire-Ghana Margin indicates that the initial invasion of oceanic surface waters into the Deep Ivorian Basin, as indicated by the presence of calcareous nannofossils, occurred during the late Albian. The nature of these assemblages suggests that these first Cretaceous oceanic surface waters were warm and relatively high in nutrients. These upper Albian sediments were deposited prior to significant tectonism at some of the sites, as indicated by their structurally deformed nature. The likely age of this tectonism is Cenomanian. The Upper Cretaceous consists of condensed sequences of hemipelagic carbonates and phosphatic hardgrounds with very low sediment accumulation rates overlain, at Site 959, by non-calcareous claystones. These Turonian through Santonian hemipelagic carbonates contain nannofossil assemblages that suggest low surface water nutrient content, resulting in starved basin conditions.

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“…Several workers (Erba 1987;Mutterlose 1987Mutterlose , 1989Mutterlose , 1991Crux 1989;Erba et al 1992) have used high proportions of Rhagodiscus asper/R. splendens as an indicator of warm surface waters.…”

Section: Nannofossil Evidencementioning

confidence: 99%

Mid-Cretaceous calcareous and siliceous microfossils from the basal Gearle Siltstone, Giralia Anticline, Southern Carnarvon Basin

Haig

Watkins

Ellis

1996

Alcheringa: An Australasian Journal of Palaeontology

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Calcareous nannofossils and Milankovitch cycles: the example of the Albian Gault Clay Formation (southern England)

Cited by 189 publications

References 20 publications

A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England

A brief warming event in the late Albian: evidence from calcareous nannofossils, macrofossils, and isotope geochemistry of the Gault Clay Formation, Folkestone, southeastern England

Calcareous nannofossils from the Cretaceous of the Deep Ivorian Basin

Mid-Cretaceous calcareous and siliceous microfossils from the basal Gearle Siltstone, Giralia Anticline, Southern Carnarvon Basin

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