Quantitative estimates of calcareous nannofossil changes across the Plenus Marls (latest Cenomanian), Dover, England: implications for the generation of the Cenomanian-Turonian Boundary Event

Lamolda, Marcos A.; Gorostidi, Amalia; Paul, C. R. C.

doi:10.1006/cres.1994.1007

Cited by 92 publications

(53 citation statements)

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“…The carbon-isotope profile at Dover (Lamolda, Gorostidi & Paul, 1994) is very similar to Eastbourne, but with δ 13 C values shifted by around − 0.4 ‰. The three peaks of the Cenomanian/Turonian Boundary Event excursion are clearly expressed (Fig.…”

Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 77%

“…The first two alternatives are judged to be unlikely, but diagenetic factors may have some influence, as indicated by the generally lower δ 13 C values at Dover. Much lower δ 18 O values characterize Bed 3 at Dover than at Eastbourne (Lamolda, Gorostidi & Paul, 1994), despite similar values through most of the section; these low δ 18 O values suggest selective alteration of Bed 3 at Dover.…”

Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 85%

“…Additional biostratigraphic sources: Culver Cliff -Jarvis, Murphy & Gale (2001); Dover -Jenkyns, Gale & Corfield (1994), Gale (1995Gale ( , 1996; Trunch -Wood, Morter & Gallois (1994); Speeton -Mitchell (1996), Mitchell, Paul & Gale (1996). Isotope data sources: Culver Cliff - Paul et al (1994b), Jarvis, Murphy & Gale (2001); Dover -Jenkyns, Gale & Corfield (1994) ;Lamolda, Gorostidi & Paul (1994), Mitchell (1996); Trunch -(this study); Speeton -Mitchell, Paul & Gale (1996). Reported δ 13 C values of Paul et al (1994b) and Mitchell, Paul & Gale (1996) increased by + 0.18 ‰ to correct offset with data of Jenkyns, Gale & Corfield (1994) rhotomagense Zone, to form a second larger peak with a value of 2.9 ‰ (Mid-Cenomanian Event Ib, Fig.…”

Section: A5 Mid-cenomanian Event Imentioning

confidence: 99%

“…Jarvis et al (1988a) documented carbon-and oxygen-isotope curves across the Cenomanian/Turonian boundary. The isotope data reported here are those of Jenkyns, Gale & Corfield (1994), replotted against our revised logs, with additional higher resolution sample data for the Middle Cenomanian from Paul et al (1994b) and Mitchell, Paul & Gale (1996), and for the Cenomanian/Turonian boundary interval from Lamolda, Gorostidi & Paul (1994).…”

Section: B East Kent (Cenomanian-campanian)mentioning

confidence: 99%

“…Detailed studies of the Cenomanian/Turonian Boundary Event and the associated stable-isotope and biostratigraphy in England have been undertaken at Dover (Jarvis et al 1988b;Lamolda, Gorostidi & Paul, 1994) and Eastbourne (Leary & Peryt, 1991;Gale et al 1993Gale et al , 2005Paul et al 1999;Keller et al 2001;Tsikos et al 2004), and isotope curves have also been published for Speeton (Mitchell, Paul & Gale, 1996) and Culver (Jarvis, Murphy & Gale, 2001). The Eastbourne Gun Gardens section in West Sussex (Figs 1, 5) is the most expanded boundary section in chalk facies in NW Europe (Paul et al 1999), and is increasingly being used as an international reference for biostratigraphic and chemostratigraphic studies (Amédro, Accarie & Robaszynski, 2005;Erbacher et al 2005;Kolonic et al 2005;Kuhnt et al 2005).…”

Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 99%

See 4 more Smart Citations

Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

et al. 2006

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-Carbon stable-isotope variation through the Cenomanian-Santonian stages is characterized using data for 1769 bulk pelagic carbonate samples collected from seven Chalk successions in England. The sections show consistent stratigraphic trends and δ 13 C values that provide a basis for highresolution correlation. Positive and negative δ 13 C excursions and inflection points on the isotope profiles are used to define 72 isotope events. Key markers are provided by positive δ 13 C excursions of up to + 2 ‰: the Albian/Cenomanian Boundary Event; Mid-Cenomanian Event I; the Cenomanian/Turonian Boundary Event; the Bridgewick, Hitch Wood and Navigation events of Late Turonian age; and the Santonian/Campanian Boundary Event. Isotope events are isochronous within a framework provided by macrofossil datum levels and bentonite horizons. An age-calibrated composite δ 13 C reference curve and an isotope event stratigraphy are constructed using data from the English Chalk. The isotope stratigraphy is applied to successions in Germany, France, Spain and Italy. Correlation with pelagic sections at Gubbio, central Italy, demonstrates general agreement between biostratigraphic and chemostratigraphic criteria in the Cenomanian-Turonian stages, confirming established relationships between Tethyan planktonic foraminiferal and Boreal macrofossil biozonations. Correlation of the Coniacian-Santonian stages is less clear cut: magnetostratigraphic evidence for placing the base of Chron 33r near the base of the Upper Santonian is in good agreement with the carbon-isotope correlation, but generates significant anomalies regarding the placement of the Santonian and Campanian stage boundaries with respect to Tethyan planktonic foraminiferal and nannofossil zones. Isotope stratigraphy offers a more reliable criterion for detailed correlation of Cenomanian-Santonian strata than biostratigraphy. With the addition of Campanian δ 13 C data from one of the English sections, a composite Cenomanian-Campanian age-calibrated reference curve is presented that can be utilized in future chemostratigraphic studies.The Cenomanian-Campanian carbon-isotope curve is remarkably similar in shape to supposedly eustatic sea-level curves: increasing δ 13 C values accompanying sea-level rise associated with transgression, and falling δ 13 C values characterizing sea-level fall and regression. The correlation between carbon isotopes and sea-level is explained by variations in epicontinental sea area affecting organic-matter burial fluxes: increasing shallow sea-floor area and increased accommodation space accompanying sea-level rise allowed more efficient burial of marine organic matter, with the preferential removal of 12 C from the marine carbon reservoir. During sea-level fall, reduced seafloor area, marine erosion of previously deposited sediments, and exposure of basin margins led to reduced organiccarbon burial fluxes and oxidation of previously deposited organic matter, causing falling δ 13 C values. Additionally, drowning of carbonate platforms during...

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Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 77%

Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 85%

Section: A5 Mid-cenomanian Event Imentioning

confidence: 99%

Section: B East Kent (Cenomanian-campanian)mentioning

confidence: 99%

Section: A11 Cenomanian/turonian Boundary Eventmentioning

confidence: 99%

See 3 more Smart Citations

Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

et al. 2006

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Sedimentary Mercury Enrichments as a Marker for Submarine Large Igneous Province Volcanism? Evidence From the Mid‐Cenomanian Event and Oceanic Anoxic Event 2 (Late Cretaceous)

Scaife

Ruhl

Dickson

et al. 2017

Geochem Geophys Geosyst

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Oceanic Anoxic Event 2 (OAE 2), during the Cenomanian‐Turonian transition (∼94 Ma), was the largest perturbation of the global carbon cycle in the mid‐Cretaceous and can be recognized by a positive carbon‐isotope excursion in sedimentary strata. Although OAE 2 has been linked to large‐scale volcanism, several large igneous provinces (LIPs) were active at this time (e.g., Caribbean, High Arctic, Madagascan, Ontong‐Java) and little clear evidence links OAE 2 to a specific LIP. The Mid‐Cenomanian Event (MCE, ∼96 Ma), identified by a small, 1‰ positive carbon‐isotope excursion, is often referred to as a prelude to OAE 2. However, no underlying cause has yet been demonstrated and its relationship to OAE 2 is poorly constrained. Here we report sedimentary mercury (Hg) concentration data from four sites, three from the southern margin of the Western Interior Seaway and one from Demerara Rise, in the equatorial proto‐North Atlantic Ocean. We find that, in both areas, increases in mercury concentrations and Hg/TOC ratios coincide with the MCE and the OAE 2. However, the increases found in these sites are of a lower magnitude than those found in records of many other Mesozoic events, possibly characteristic of a marine rather than atmospheric dispersal of mercury for both events. Combined, the new mercury data presented here are consistent with an initial magmatic pulse at the time of the MCE, with a second, greater pulse at the onset of OAE 2, possibly related to the emplacement of LIPs in the Pacific Ocean and/or the High Arctic.

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Intercontinental correlation of organic carbon and carbonate stable isotope records: evidence of climate and sea‐level change during the Turonian (Cretaceous)

Jarvis

Trabucho‐Alexandre

Gröcke

et al. 2015

The Depositional Record

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Carbon (d 13 C org , d 13 C carb ) and oxygen (d 18 O carb ) isotope records are presented for an expanded Upper Cretaceous (Turonian-Coniacian) hemipelagic succession cored in the central Bohemian Cretaceous Basin, Czech Republic. Geophysical logs, biostratigraphy and stable carbon isotope chemostratigraphy provide a high-resolution stratigraphic framework. The d 13 C carb and d 13 C org profiles are compared, and the time series correlated with published coeval marine and non-marine isotope records from Europe, North America and Japan. All previously named Turonian carbon isotope events are identified and correlated at high-resolution between multiple sections, in different facies, basins and continents. The viability of using both carbonate and organic matter carbon isotope chemostratigraphy for improved stratigraphic resolution, for placing stage boundaries, and for intercontinental correlation is demonstrated, but anchoring the time series using biostratigraphic data is essential. An Early to Middle Turonian thermal maximum followed by a synchronous episode of stepped cooling throughout Europe during the Middle to Late Turonian is evidenced by bulk carbonate and brachiopod shell d18 O carb data, and regional changes in the distribution and composition of macrofaunal assemblages. The Late Turonian Cool Phase in Europe was coincident with a period of long-term sea-level fall, with significant water-mass reorganization occurring during the mid-Late Turonian maximum lowstand. Falling D 13 C (d 13 C carb -d 13 C org ) trends coincident with two major cooling pulses, point to pCO 2 drawdown accompanying cooling, but the use of paired carbon isotopes as a high-resolution pCO 2 proxy is compromised in the low-carbonate sediments of the Bohemian Basin study section by diagenetic overprinting of the d 13 C carb record. Carbon isotope chemostratigraphy is confirmed as a powerful tool for testing and refining intercontinental and marine to terrestrial correlations.

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Quantitative estimates of calcareous nannofossil changes across the Plenus Marls (latest Cenomanian), Dover, England: implications for the generation of the Cenomanian-Turonian Boundary Event

Cited by 92 publications

References 0 publications

Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

Sedimentary Mercury Enrichments as a Marker for Submarine Large Igneous Province Volcanism? Evidence From the Mid‐Cenomanian Event and Oceanic Anoxic Event 2 (Late Cretaceous)

Intercontinental correlation of organic carbon and carbonate stable isotope records: evidence of climate and sea‐level change during the Turonian (Cretaceous)

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Quantitative estimates of calcareous nannofossil changes across the Plenus Marls (latest Cenomanian), Dover, England: implications for the generation of the Cenomanian-Turonian Boundary Event

Cited by 92 publications

References 0 publications

Secular variation in Late Cretaceous carbon isotopes: a new δ13C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

Secular variation in Late Cretaceous carbon isotopes: a new δ13C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

Sedimentary Mercury Enrichments as a Marker for Submarine Large Igneous Province Volcanism? Evidence From the Mid‐Cenomanian Event and Oceanic Anoxic Event 2 (Late Cretaceous)

Intercontinental correlation of organic carbon and carbonate stable isotope records: evidence of climate and sea‐level change during the Turonian (Cretaceous)

Contact Info

Product

Resources

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Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)

Secular variation in Late Cretaceous carbon isotopes: a new δ¹³C carbonate reference curve for the Cenomanian–Campanian (99.6–70.6 Ma)