Orbitolina episodes in carbonate platform evolution: the early Aptian model from SE Spain

Vilas, Lorenzo; Masse, Jean Pierre; Arias, C.

doi:10.1016/0031-0182(95)00058-5

Cited by 109 publications

(75 citation statements)

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“…Namely, the flat low-conical species are generally found in marly or calcareous marly levels, which seemingly represent transgressive to maximum flooding intervals (Vilas et al, 1995;Immenhauser et al, 1999;Jones et al, 2004). The local range of these taxa could be related more to the occurrence of the appropriate facies, controlled by local to regional sea-level history, than to evolutionary processes of speciation and extinction.…”

Section: Chronostratigraphic Calibration Of Carbonate Platform Biostrmentioning

confidence: 99%

Bio-chemostratigraphy of the Barremian-Aptian shallow-water carbonates of the southern Apennines (Italy): pinpointing the OAE1a in a Tethyan carbonate platform

et al. 2012

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Abstract. Low biostratigraphic resolution and lack of chronostratigraphic calibration hinder precise correlations between platform carbonates and coeval deep-water successions. These are the main obstacle when studying the record of Mesozoic oceanic anoxic events in carbonate platforms. In this paper carbon and strontium isotope stratigraphy are used to produce the first chronostratigraphic calibration of the Barremian-Aptian biostratigraphy of the Apenninic carbonate platform of southern Italy. According to this calibration, the segment of decreasing δ 13 C values, leading to the negative peak that is generally taken as the onset of the Selli event, starts a few metres above the last occurrence of Palorbitolina lenticularis and Voloshinoides murgensis. The following rise of δ 13 C values, corresponding to the interval of enhanced accumulation of organic matter in deep-water sections, ends just below the first acme of Salpingoporella dinarica, which roughly corresponds to the segment of peak δ 13 C values. The whole carbon isotope excursion associated with the oceanic anoxic event 1a is bracketed in the Apenninic carbonate platform between the last occurrence of Voloshinoides murgensis and the "Orbitolina level", characterized by the association of Mesorbitolina parva and Mesorbitolina texana. Since these bioevents have been widely recognized beyond the Apenninic platform, the calibration presented in this paper can be used to pinpoint the interval corresponding to the Early Aptian oceanic anoxic event in other carbonate platforms of central and southern Tethys. This calibration will be particularly useful to interpret the record of the Selli event in carbonate platform sections for which a reliable carbon isotope stratigraphy is not available.

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Section: Chronostratigraphic Calibration Of Carbonate Platform Biostrmentioning

confidence: 99%

Bio-chemostratigraphy of the Barremian-Aptian shallow-water carbonates of the southern Apennines (Italy): pinpointing the OAE1a in a Tethyan carbonate platform

et al. 2012

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“…By the Barremian, new forms and a major new lineage appeared in Tethys, the agglutinated orbitolinids. These robust forms had the ability to survive in many shallow carbonate environments (Arnaud-Vanneau, 1980), however, they were most common in the outer platform (Vilas et al, 1995). They strengthened their conical test by subdividing it into many small chamberlets, which housed within their walls symbiotic algae.…”

Section: Palaeoecology Of the Cretaceous Larger Foraminiferamentioning

confidence: 99%

Evolution and Geological Significance of Larger Benthic Foraminifera

2018

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“…Vilas et al, 1995;Simmons et al, 2000;Burla et al, 2008;Embry et al, 2010). During the Aptian a high nutrient supply to the oceans was proposed to have been stimulated moreover by increased amounts of carbon dioxide in the atmosphere Clarke and Jenkyns (1999, Exmouth Plateau) and Fassel and Bralower (1999, Falkland Plateau).…”

Section: Regional-to-global Significance Of the Isotope Recordmentioning

confidence: 99%

“…The synchronous partial decline in the abundance of oligotrophic biota indicates an important deterioration of the palaeoenvironment as the result of highly trophic seawater (e.g. Vilas et al, 1995;Graziano, 1999;Simmons et al, 2000;Embry et al, 2010;Schroeder et al, 2010), and as also testified by the simultaneous local development of microbialites (Whalen et al, 2002;Schroeder et al, 2010).…”

mentioning

confidence: 99%

“…During the Aptian-Albian, orbitolinid-dominated, often clay-rich facies occurred in shallow-marine (ArnaudVanneau and Arnaud, 1990;Burla et al, 2008; and in deeper, sanddominated settings (Vilas et al, 1995;Ruiz-Ortiz and Castro, 1998) in many parts of the western Tethys, the North Atlantic and the Middle East. This implies that orbitolinid-rich facies cannot be directly related to a specific palaeoenvironment on carbonate platforms.…”

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confidence: 99%

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Shallow water carbonate platforms (Late Aptian–Early Albian, Southern Apennines) in the context of supraregional to global changes: re-appraisal of palaeoecological events as reflectors of carbonate factory response

Raspini

2012

Solid Earth

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Abstract. This paper discusses the palaeoenvironmental significance of the "Orbitolina Level", the microbial carbonates and the Salpingoporella dinarica-rich deposits encased in the Aptian/Albian shallow water carbonate platform strata of Monte Tobenna and Monte Faito (Southern Italy). These facies show a peculiar field appearance due to their color and/or fossil content. In the shallow water carbonate strata, the Late Aptian "Orbitolina Level" was formed during a period of decreasing accommodation space. Microbial carbonates occur in different levels in the composite section. They reach their maximum thickness around the sequence boundaries just above the "Orbitolina Level" and close to the AptianAlbian transition, and were not deposited during maximum flooding. S. dinarica-rich deposits occur in the lower part of the Monte Tobenna-Monte Faito composite section, in both restricted and more open lagoonal sediments. S. dinarica has its maximum abundance below the "Orbitolina Level" and disappears 11 m above this layer.On the basis of δ 13 C and δ 18 O values recorded at TobennaFaito, the succession has been correlated to global sea-level changes and to the main volcanic and climatic events during the Aptian. Deterioration of the inner lagoon environmental conditions was related to high trophic levels triggered by volcano-tectonic activity. Microbial carbonates were deposited especially in periods of third-order sea level lowering. In such a scenario, periods of increased precipitation during the Gargasian induced the mobilization of clay during flooding of the exposed platform due to high-frequency sea-level changes, with consequent terrigenous input to the lagoon. This and the high nutrient levels made the conditions unsuitable for the principle carbonate producers, and an opportunistic biota rich in orbitolinids (Mesorbitolina texana and M. parva) populated the platform. In the more open marine domain, the increased nutrient input enhanced the production of organic matter and locally led to the formation of black shales (e.g. the Niveau Fallot in the Vocontian Basin).It is argued that the concomitant low Mg/Ca molar ratio and high concentration of calcium in seawater could have favoured the development of the low-Mg calcite skeleton of the S. dinarica green algae.During third-order sea-level rise, no or minor microbial carbonates formed in the shallowlagoonal settings and S. dinarica disappeared. Carbonate neritic ecosystems were not influenced by the environmental changes inferred to have been induced by the mid-Cretaceous volcanism.The "Orbitolina Level", the microbial carbonates and the Salpingoporella dinarica-rich deposits in the studied Aptian/Albian shallow water carbonate strata are interpreted to be the response to environmental and oceanographic changes in shallow-water and deeper-marine ecosystems.

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Orbitolina episodes in carbonate platform evolution: the early Aptian model from SE Spain

Cited by 109 publications

References 14 publications

Bio-chemostratigraphy of the Barremian-Aptian shallow-water carbonates of the southern Apennines (Italy): pinpointing the OAE1a in a Tethyan carbonate platform

Bio-chemostratigraphy of the Barremian-Aptian shallow-water carbonates of the southern Apennines (Italy): pinpointing the OAE1a in a Tethyan carbonate platform

Evolution and Geological Significance of Larger Benthic Foraminifera

Shallow water carbonate platforms (Late Aptian–Early Albian, Southern Apennines) in the context of supraregional to global changes: re-appraisal of palaeoecological events as reflectors of carbonate factory response

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