high resolution δ13C stratigraphy through the Selli Oceanic Anoxic Event (OAE1a) in the Apulia carbonate platform: the Borgo Celano section (western Gargano Promontory, Southern Italy)

Graziano, Roberto; Raspini, Arturo; Spalluto, Luigi

doi:10.3301/ijg.2013.16

Cited by 13 publications

(15 citation statements)

References 115 publications

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“…The few available data concern the late Cenomanian C. joannae (e.g., Ayoub-Hannaa and Fürsich, 2011;Ayoub-Hannaa et al, 2014). As already noted by Dhondt and Dieni (1993), upper Aptian Chondrodonta specimens from southern Italy (Accordi et al, 1990) In the Gargano Promontory (southern Italy), lower Aptian Chondrodonta-bearing beds are reported from the Apulia Carbonate Platform (ACP) in lagoonal to tidal flat settings (San Giovanni Rotondo Limestones, SGRL; Cremonini et al, 1971, Luperto Sinni andMasse, 1986;Graziano et al, 2013;Guerzoni, 2016) and in a re-sedimented pluri-decametric slab representing platform-basin margin facies (Montagna degli Angeli Limestones, MAL; Graziano et al, 2013;Guerzoni, 2016;Morsilli et al, 2017). In the SGRL the bivalve accumulations have been ascribed to the genus Chondrodonta (Checchia Rispoli, 1921;Cremonini et al, 1971;Luperto Sinni and Masse, 1986;Graziano, 2013;Graziano et al, 2013;Guerzoni, 2016), or as to ostreids (Claps et al, 1996;Spalluto et al, 2005).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…In the SGRL the bivalve accumulations have been ascribed to the genus Chondrodonta (Checchia Rispoli, 1921;Cremonini et al, 1971;Luperto Sinni and Masse, 1986;Graziano, 2013;Graziano et al, 2013;Guerzoni, 2016), or as to ostreids (Claps et al, 1996;Spalluto et al, 2005). The SGRL bivalve accumulations are characterized by Chondrodonta and requieniids (Chondrodonta and requieniids member in Graziano et al, 2013). The SGRL and MAL bivalve accumulations are here analysed in terms of shell morphology, microstructures and functional morphology in order to understand their systematic position and their early evolutionary phase in the Mediterranean province, where only citations or outcrop illustrations are available in literature (e.g., Masse, 1993;Bover-Arnal et al, 2009Najarro et al, 2011;Skelton and Gili, 2012;Graziano, 2013;Graziano et al, 2013;Gili et al, 2016).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Palaeoecology of Chondrodonta (Bivalvia) from the lower Aptian (Cretaceous) Apulia Carbonate Platform (Gargano Promontory, southern Italy)

Posenato

Morsilli

Guerzoni

et al. 2018

Palaeogeography, Palaeoclimatology, Palaeoecology

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Accepted Manuscriptmentioning

confidence: 99%

Palaeoecology of Chondrodonta (Bivalvia) from the lower Aptian (Cretaceous) Apulia Carbonate Platform (Gargano Promontory, southern Italy)

Posenato

Morsilli

Guerzoni

et al. 2018

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The studied succession belongs to the Lower Cretaceous inner platform facies of the San Giovanni Rotondo Limestone (SGRL) (Luperto Sinni & Masse, 1986; Di Palma, 1995; Claps et al ., 1996; Graziano et al ., 2013). The SGRL crops out in the eastern and south‐eastern Gargano Promontory (Fig.…”

Section: Stratigraphic Settingsmentioning

confidence: 99%

Proliferation of Chondrodonta as a proxy of environmental instability at the onset of OAE1a: Insights from shallow‐water limestones of the Apulia Carbonate Platform

et al. 2021

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Chondrodonta is an opportunistic, oyster-like bivalve, common in shallowwater carbonates of the Cretaceous Tethyan Realm. Despite its high abundance and widespread geographic distribution, the precise relationship between the early Aptian proliferation and environmental perturbations resulting from the Oceanic Anoxic Event 1a (OAE1a), has not been investigated. Stratigraphic and geochemical analyses of the lower Aptian Chondrodonta bedsets within the inner platform limestones of the Apulia Carbonate Platform (Gargano Promontory, southern Italy) are conducted to assess the environmental controls on the Chondrodonta proliferation and its timing and causal relationship to OAE1a. Chondrodonta occurs with sparse to common individuals within requieniid rudist floatstone-rudstones, forms monospecific biostromes during the early phase of stressed environmental conditions and then rapidly disappears at the peak of OAE1a. It proliferates in dysoxic seawater with relatively increased trophic sources, which correlate to increasing nutrient levels in the nearby pelagic realm. Chondrodontarich beds are associated worldwide with the onset of OAE1a and occur in a transitional context between a stable and a strongly stressed environment, where the opportunistic behaviour of Chondrodonta is rather efficient. Increasing nutrient load and unstable environmental conditions right below the peak of OAE1a created an environmental 'window' favourable for Chondrodonta to proliferate, outplaying the less tolerant benthos (for example, rudists). The occurrence, duration and position of the environmental window were controlled by local palaeogeographic and hydrodynamic settings (i.e. low energy, decreased seawater oxygenation and circulation). Further increase in inhospitable conditions, leading to OAE1a, constituted an upper threshold for Chondrodonta and allowed mesotrophic taxa like Bacinella-Lithocodium and orbitolinids to dominate the benthic 3191

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“…Chondrodonta has been considered an opportunistic and r-strategist taxon (Graziano et al, 2013) with a broad geographic (Middle East to Caribbean regions) and stratigraphic (Barremian to Turonian) distribution. The early Aptian C. glabra formed in the Gargano Promontory paucispecific accumulations containing a single or few generations which were rapidly buried after periodic mass mortality events.…”

Section: Early Aptian and Late Cenomanian Chondrodonta Proliferationmentioning

confidence: 99%

“…During the early evolutionary phase, in the early Aptian, Chondrodonta was of characteristically small sized and with prevailing smooth shells with a short hinge plate. These characters distinguished C. glabra Stanton, which in the Gargano Promontory (southern Italy) created meter-thick accumulations located stratigraphically below the onset of the OAE 1a (Graziano, 2013;Graziano et al, 2013;Guerzoni, 2016;Posenato et al, 2018). This species developed a mud-sticker bottom stabili ation and produced moderately elongated, sticklike shells (Posenato et al, 2018).…”

Section: Introductionmentioning

confidence: 97%

Paleoecology and proliferation of the bivalve Chondrodonta joannae (Choffat) in the upper Cenomanian (Upper Cretaceous) Adriatic Carbonate Platform of Istria (Croatia)

Posenato

Frijia

Morsilli

et al. 2020

Palaeogeography, Palaeoclimatology, Palaeoecology

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Chondrodonta joannae (Choffat) is a morphologically variable oyster-like bivalve with a predominately calcitic shell. An exceptional exposure of C. joannae-bearing strata of late Cenomanian age crops out along the seaside in northern Istria (Croatia) and permits a taphonomical and functional analysis in order to define the life habit and growth strategies of this bivalve. The C. joannae population from the studied succession is characterised by highly-elongated, large and curved shells, reaching about 50 cm in height and 5 cm in length. This shell shape is typical of the club-like bivalve morphotype, which was adapted to soft-bottom substrates with high sediment accumulation. The shell is slightly inequivalve and characterized by a reduced body cavity, a few centimetres high, and a dorsal region up to 10 times longer. The shell opening mechanism was mostly based on the resilium located between the chondrophores which protrude in the body cavity.The abandoned dorsal cavity is filled by a calcite hinge plate, the ventral edge of which acted as fulcrum for the valve flexibility. In the hinge plate, the function of chondrophores changed. They acted as a hinge to keep tightly interlocked the valves, which considerably emerged above the sediment-water interface. The individuals were arranged in low shrub-type congregations, which produced low-relief mounds. The functional morphology and taphonomic signature suggest that C. joannae individuals collected food at a greater distance from the bottom with respect to the cooccurring rudists. We speculate that the C. joannae proliferation could be related to a late Cenomanian phase of environmental instability predating the OAE2 with fluctuating climatic conditions and ocean fertility.

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high resolution δ13C stratigraphy through the Selli Oceanic Anoxic Event (OAE1a) in the Apulia carbonate platform: the Borgo Celano section (western Gargano Promontory, Southern Italy)

Cited by 13 publications

References 115 publications

Palaeoecology of Chondrodonta (Bivalvia) from the lower Aptian (Cretaceous) Apulia Carbonate Platform (Gargano Promontory, southern Italy)

Palaeoecology of Chondrodonta (Bivalvia) from the lower Aptian (Cretaceous) Apulia Carbonate Platform (Gargano Promontory, southern Italy)

Proliferation of Chondrodonta as a proxy of environmental instability at the onset of OAE1a: Insights from shallow‐water limestones of the Apulia Carbonate Platform

Paleoecology and proliferation of the bivalve Chondrodonta joannae (Choffat) in the upper Cenomanian (Upper Cretaceous) Adriatic Carbonate Platform of Istria (Croatia)

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