Jurassic

Ogg, James G.; Ogg, Gabi M.; Gradstein, Felix M.

doi:10.1016/b978-0-444-59467-9.00012-1

Cited by 35 publications

(69 citation statements)

References 30 publications

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“…This is in good agreement with the current full duration of the Tithonian estimated at ~7 Ma (Ogg et al, 2016b ages for the base of the Berriasian and the early Tithonian are with the expected duration of the Tithonian. Incidentally, this result also has direct implications for the age of the KmTB: Currently, the recommended boundary age is 152.1 Ma (Ogg et al, 2016b). Admittedly, the ash bed LY-5 is not at the KmTB albeit close; therefore, we acknowledge that the age of KmTB would have to be older than bed LY-5.…”

Section: The Early Tithonian and The Base Of The Vaca Muerta Formationsupporting

confidence: 79%

“…This result is in close agreement with other studies that have dated the early Tithinon. For instance, Malinverno et al (2012) quote an age 147.95 ± 1.95 Ma for the M22An chron (i.e., a formal definition of the Kimmeridgian-Tithonian boundary (KmTB) (Ogg et al, 2016b). Muttoni et al 25 (2018) suggests that the base of the Tethyan Tithonian (top Kimmeridgian) falls in the lower part of M22n at a nominal age of ~146.5 Ma based on the FO of the nannofossil Conusphaera mexicana minor.…”

Section: The Early Tithonian and The Base Of The Vaca Muerta Formationmentioning

confidence: 99%

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Cross-continental age calibration of the Jurassic/Cretaceous boundary

Lena

López‐Martínez

Lescano

et al. 2018

Preprint

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Abstract. The age of the Jurassic/Cretaceous boundary has remained elusive for the past decades. In this study we evaluate how well the determined boundary age agrees between two distinct sections from different sedimentary basins, and whether we can constrain a globally valid Jurassic/Cretaceous boundary age. Here we present high-precision U-Pb zircon age determinations on single grains of volcanic zircon of two sections that span the Jurassic/Cretaceous: the Las Loicas section, 15Argentina, and the Mazatepec section in Mexico. These two sections display well-established primary and secondary stratigraphic markers as well as interbedded volcanic horizons that allow bracketing the age of the Jurassic/Cretaceous boundary at 140.22 ± 0.13 Ma. We also present the first age determinations in the early Tithonian and tentatively propose a minimum duration of ~7 Ma for the Tithonian stage.

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Section: The Early Tithonian and The Base Of The Vaca Muerta Formationsupporting

confidence: 79%

Section: The Early Tithonian and The Base Of The Vaca Muerta Formationmentioning

confidence: 99%

Cross-continental age calibration of the Jurassic/Cretaceous boundary

Lena

López‐Martínez

Lescano

et al. 2018

Preprint

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“…The sea‐level fall related progradation from the Upper Aalenian Murchisonae zone to the Bradfordensis zone (mrs Aal1), 172·13 to 170·83 Ma according to Ogg & Hinnow (), resulted in the formation of up to 100 m thick deltaic deposits stretching more than 350 km from the northern basin margins towards the Altmark area in the south (Zimmermann et al ., ; Figs 10A and 12A).…”

Section: The Toarcian–bajocian Deltaic Systemmentioning

confidence: 99%

“…In a recent study, Zimmermann et al . () investigated the Toarcian–Bajocian succession in terms of biostratigraphy and sequence stratigraphy and provided well‐dated standard sections, which are calibrated to zones and partial subzones of the North‐west European ammonite zonation and chronostratigraphic ages according to Ogg & Hinnow ().…”

Section: Geological Setting and Stratigraphic Controlmentioning

confidence: 99%

“…A and C) in the Lower Toarcian (mrs Toa 1) and Upper Toarcian (mrs Toa 2) resulted in up to 40 m thick deltaic successions stretching up to the East Prignitz and North Brandenburg areas. The maximum progradation in the Lower Toarcian Bifrons zone, 180·36 to 178·24 Ma according to Ogg & Hinnow (), and the Upper Toarcian Thouarsense zone, 176·23 to 174·97 Ma according to Ogg & Hinnow (), resulted in the final outbuilding of delta plains stretching about 200 km from northern basin margins to the basin centre (Fig. A and B).…”

Section: The Toarcian–bajocian Deltaic Systemmentioning

confidence: 99%

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The Toarcian–Bajocian deltaic system in the North German Basin: Subsurface mapping of ancient deltas‐morphology, evolution and controls

Zimmermann

Franz²,

Schaller

et al. 2017

Sedimentology

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Research focussing on the morphology and morphodynamics of modern river deltas has contributed much to the understanding of reservoir geometry and prediction of hydrocarbon splays and deep geothermal aquifers. The interplay of allogenic and autogenic controls results in complex histories of modern river deltas comprising subsequent regressive and transgressive stages of delta formation. The application to ancient examples is still ambiguous and in particular the detailed morphological description of ancient deltas is often hampered by limited subsurface data. This basin‐scale study employs a data set of 15 cored wells and more than 450 logged wells in combination with lithofacies, biofacies and architectural analysis to reconstruct high‐resolution subsurface facies and sand thickness maps of the Toarcian–Bajocian deltaic system in the North German Basin. The results of this study show the evolution from smaller elongate river‐dominated delta types in the Lower and Upper Toarcian (15 000 to 20 000 km²), and a larger lobate river‐dominated delta in the Upper Aalenian (40 000 km²) to a cuspate mixed river‐dominated and wave‐modified delta in the Upper Bajocian (25 000 km²). River‐dominated deltas are formed of distributary deltaic channel belts and associated sheetsands of the delta plain and distributary‐mouth bar complexes with bar‐finger sand architectures of the delta front. Increasing marine processes in the Bajocian resulted in modification of delta complexes forming a shoreface setting with foreshoals, arc‐like chains of ooid‐bearing barrier shoals and back barrier lagoons. The complex history of the Toarcian–Bajocian deltaic system was mainly controlled by allogenic sea‐level fluctuations that triggered the delta progradation and subordinately by allogenic basin reorganization. Autogenic process change of channel avulsion led to locally reduced sediment flux and culminated in lobe abandonment and transgressive shorelines. Differential compaction of underlying deltaic deposits result in strong differences in accommodation space and contributed greatly to large‐scale delta shifts (>300 km).

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Taxonomical diversity and palaeobiogeographical affinity of belemnites from the Pliensbachian–ToarcianGSSP(Lusitanian Basin, Portugal)

Rita

Weis

Duarte

et al. 2020

Papers in Palaeontology

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High-resolution analysis of the late Pliensbachianearly Toarcian belemnite assemblages from the Peniche section (Lusitanian Basin) has enabled, for the first time, recognition of eight taxa of the suborder Belemnitina, previously reported from contemporaneous north-west Tethyan and Arctic sections. The presence of Bairstowius amaliae sp. nov. in the late Pliensbachian (emaciatum Zone) represents a novelty given that hitherto the genus Bairstowius was known only from late Sinemurian and early Pliensbachian deposits. Additionally, the replacement of Bairstowius amaliae by Catateuthis longiforma, during the latest Pliensbachian, suggests an evolutionary relationship between the two taxa. This relationship suggests a new scenario for the subsequent development of endemic Toarcian Boreal-Arctic faunas, characterized by the occurrence of Catateuthis. Comparison of the Peniche belemnite fauna with coeval faunas from the Mediterranean/Submediterranean and Euro-Boreal domains indicates taxonomic uniformity during the late Pliensbachian and early Toarcian (emaciatum and polymorphum Zones), in the north-west Tethys. Despite the lack of a marked taxonomic turnover, the Pliensbachian-Toarcian boundary corresponds to a slight decrease in diversity observed not only in the Lusitanian Basin but also in coeval north-western European basins. Ordination and cluster analyses indicate that the largest changes in belemnite diversity and palaeogeographical distribution occurred rather during the Toarcian Oceanic Anoxic Event (base of the levisoni Zone). This event is marked by the extinction of taxa, affecting more severely the Mediterranean/Submediterranean domain and resulting in a more pronounced provincial differentiation among north-western European and Arctic belemnite faunas.

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Jurassic

Cited by 35 publications

References 30 publications

Cross-continental age calibration of the Jurassic/Cretaceous boundary

Cross-continental age calibration of the Jurassic/Cretaceous boundary

The Toarcian–Bajocian deltaic system in the North German Basin: Subsurface mapping of ancient deltas‐morphology, evolution and controls

Taxonomical diversity and palaeobiogeographical affinity of belemnites from the Pliensbachian–ToarcianGSSP(Lusitanian Basin, Portugal)

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