The Cretaceous Period

Ogg, James G.; Agterberg, Frits; Gradstein, Felix M.

doi:10.1017/cbo9780511536045.020

Cited by 135 publications

(181 citation statements)

References 164 publications

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“…Age datum levels used to calibrate the isotope curve are listed in Table 3. The calculated age of the base of the M. dixoni Zone of 97.74 Ma is slightly older than previous estimates Voigt, 2000) due to the greater age assigned to the base of the Cenomanian by Ogg, Agterberg & Gradstein (2004). The calculated age of the base of the A. jukesbrownei Zone at 94.93 Ma agrees closely with previous estimates.…”

Section: E1 Cenomaniansupporting

confidence: 83%

“…Correlation of Albian/Cenomanian Boundary δ 13 C events in Europe. The Mont Risou section near Rosans in SE France is the Global boundary Stratotype Section and Point (GSSP) for the Cenomanian Stage (Tröger & Kennedy, 1996;Ogg, Agterberg & Gradstein, 2004). The base of the stage is defined by the first appearance datum (FAD) of the planktonic foraminifera Rotalipora globotruncanoides.…”

Section: A5 Mid-cenomanian Event Imentioning

confidence: 99%

“…12). Isotope data were plotted against the time scale of Ogg, Agterberg & Gradstein (2004), supplemented by data in Hardenbol et al (1998); ages were assigned to samples, assuming a constant accumulation rate between age datum levels (Table 3).…”

Section: D8 Santonian/campanian Boundary Eventmentioning

confidence: 99%

“…Sources of data for different intervals are indicated on the right of the figure. The curve has been calibrated using the age assignments of Ogg, Agterberg & Gradstein (2004) and Hardenbol et al (1998); see Table 3 and text for details. Individual data points are indicated by circles.…”

Section: E1 Cenomanianmentioning

confidence: 99%

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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)

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: E1 Cenomaniansupporting

confidence: 83%

Section: A5 Mid-cenomanian Event Imentioning

confidence: 99%

Section: D8 Santonian/campanian Boundary Eventmentioning

confidence: 99%

Section: E1 Cenomanianmentioning

confidence: 99%

See 2 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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“…For instance, Premoli-Silva & Verga (2004) defined its upper boundary at the level of "the extinction of most of the Cretaceous planktonic foraminifers". Such definition, however, is imprecise, and it does not necessarily coincide with the K/Pg boundary, as is shown by Ogg et al (2004;p. 355), where the last occurrence of A. mayaroensis appears below the K/Pg boundary (see also Robaszynski & Caron 1995).…”

Section: Introductionmentioning

confidence: 99%

Last occurrence of Abathomphalus mayaroensis (Bolli) foraminiferid index of the Cretaceous–Paleogene boundary: the calcareous nannofossil proof

Kędzierski¹,

Gasiński²,

Uchman³

2015

Geologica Carpathica

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Abstract:In the Gaj section (Polish Carpathians, Skole Nappe, Ropianka Formation), the Late Maastrichtian calcareous nannofossil biostratigraphy is compared with foraminiferal zonation based on the occurrence of the planktonic foraminiferid index species Abathomphalus mayaroensis. It appears that the LO of A. mayaroensis, which has been used previously in the studied section as the possible K/Pg boundary indicator is located below the boundary. The disappearance of A. mayaroensis along with other planktonic foraminiferids before the Cretaceous-Paleogene (K/Pg) boundary mass extinction event may be a consequence of the Late Maastrichtian rapid warming pulses. Moreover, the Paleogene age cannot be supported by the FO of the benthic foraminiferid Rzehakina fissistomata, because it first appears together with the nannofossil Ceratolithoides kamptneri (zonal marker for the latest Maastrichtian UC20c TP Zone). According to the present study, the whole studied section represents the lower Upper to the upper Upper Maastrichtian UC20b TP and UC20c TP nannofossil zones, so that it corresponds to the lower-middle part of the planktonic foraminiferal A. mayaroensis Zone, which, according to the scheme by Caron (1985), should extend up to the K/Pg boundary.

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The Early Aptian volcanic episode of Gutiolo (N Spain): Expression of the Bilbao Rift Fault Zone

et al. 2018

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The Gutiolo volcanic unit belongs to the Aptian Bilbao Formation and crops out 6 km SE of Bilbao (N Spain) within marine marlstones. It is 300 m thick and up to 1 km long. The volcanics consist of lava in the lower part and volcaniclastic sediments above, with metatrachytes and metatrachybasalts, similar to others of the alkali Cretaceous sequence in the Basque–Cantabrian Basin. The palaeontological age is top early Aptian (Dufrenoyia furcata Zone) near the Bedoulian–Gargasian substage transition, and the isotopic age (K–Ar) is 123 ± 3 Ma but most probably, 122 Ma. E–W and N–S trending faults bounding the Gutiolo volcanics controlled magma eruption. Other NW‐ and SE‐oriented major faults in the Bilbao area favoured several Valanginian to Santonian eruptions including Gutiolo. The eruptions moved progressively in space and time from SW to NE. These faults make up a 15‐km‐wide tectonic belt, the magma‐leaky Bilbao Fault Zone. A similar magmatic fault zone NE of Bilbao, Gernika‐Elgoibar, poured magma onto the sea floor during the late Albian–Cenomanian up to the Santonian, continuing the north‐easterly younging trend of volcanic inceptions recognized in Bilbao. All this Cretaceous volcanism is related to the Bay of Biscay opening processes, and the Gutiolo event is correlated with the first appearance of oceanic crust in the Bay of Biscay. From stratigraphic, volcanic, geochemical, and mineralization evidence, we attribute Gutiolo to an early phase of mafic intrusion emplacement in the Bilbao area, underplated by magmatism during the Valanginian to Santonian (Cretaceous). Volcanic hydrothermal fluids associated to the Gutiolo event are considered responsible for metallic ore emplacement in the Basque–Cantabrian Basin during the early Aptian.

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The Cretaceous Period

Cited by 135 publications

References 164 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)

Last occurrence of Abathomphalus mayaroensis (Bolli) foraminiferid index of the Cretaceous–Paleogene boundary: the calcareous nannofossil proof

The Early Aptian volcanic episode of Gutiolo (N Spain): Expression of the Bilbao Rift Fault Zone

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The Cretaceous Period

Cited by 135 publications

References 164 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)

Last occurrence of Abathomphalus mayaroensis (Bolli) foraminiferid index of the Cretaceous–Paleogene boundary: the calcareous nannofossil proof

The Early Aptian volcanic episode of Gutiolo (N Spain): Expression of the Bilbao Rift Fault Zone

Contact Info

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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)