Major palaeoenvironmental perturbation in an Early Aptian carbonate platform: Prelude of the Oceanic Anoxic Event 1a?

Najarro, María; Rosales, Idoia; Martı́n-Chivelet, Javier

doi:10.1016/j.sedgeo.2010.03.011

Cited by 47 publications

(27 citation statements)

References 72 publications

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“…The Barremian to lowermost Aptian succession onlaps progressively westward onto the Triassic rocks. At the studied section transgressive marine Aptian sandstones, marls, and shallow-water carbonates rest unconformably on the Triassic (Najarro et al 2011;Fig. 1b).…”

Section: Geological Settingmentioning

confidence: 94%

“…One of those sub-basins is the North Cantabrian Basin (NCB, Fig. 1a), which acted during the early-and mid-Cretaceous as a relatively independent east-west-elongated sub-basin in the northwestern margin of the Basque-Cantabrian Basin (Wilmsen 2000;Najarro et al 2011). The studied section forms part of the Cretaceous succession of the La Florida block, located in the western margin of the NCB (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

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The uppermost Albian–lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera

Rosales

Schlagintweit²

2015

Facies

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Section: Geological Settingmentioning

confidence: 94%

Section: Geological Settingmentioning

confidence: 99%

The uppermost Albian–lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera

Rosales

Schlagintweit²

2015

Facies

Self Cite

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“…The concept of drowning unconformities is well established and there are many examples of carbonate platform drowning strata documented in the rock record worldwide (e.g., Schlager 1981Schlager , 1989Hallock and Schlager 1986;Longman et al 1987;Simone and Carannante 1988;Erlich et al 1990Erlich et al , 1993Föllmi et al 1994;Drzewiecki and Simo 1997;Weissert et al 1998;Blomeier and Reijmer 1999;Wortmann and Weissert 2000;Wissler et al 2003;Ruiz-Ortiz et al 2004;Mutti et al 2005;Föllmi and Gainon 2008;Sattler et al 2009;Najarro et al 2011;Marino and Santantonio 2010;Brandano et al 2016;Sulli and Interbartolo 2016). Carbonate platforms are defined as flat-topped accumulations of carbonate sediments developed at or very near sea level (Hallock and Schlager 1986).…”

Section: Introductionmentioning

confidence: 99%

Carbonate drowning successions of the Bird’s Head, Indonesia

Gold

Burgess

BouDagher‐Fadel

2017

Facies

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environment. Already foundering carbonate platforms due to environmental deterioration were left vulnerable to submergence and eventually succumbed to drowning. Low rates of carbonate production were outpaced by the rate of relative sea-level rise caused by high-amplitude oscillations in global glacio-eustatic sea-level change and/or regional tectonic subsidence. The duration of the drowning event across the entire Bird's Head region is interpreted to have lasted a duration of approximately 9.5 My, between 18.0 and 8.58 Ma. This has implications when interpreting timings of sedimentary basin fill across western New Guinea and in other basins where carbonate platform drowning is recorded.

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“…In order to compare mass occurrences of these taxa at different localities (Oman, Croatia, France, Spain, and Portugal), previously published data dealing with mid-Cretaceous Lithocodium aggregatum and, in particular, Baci nella irregularis (Immenhauser et al, 2005;Embry et al, 2010;Huck et al, 2010;Najarro et al, 2010;Rameil et al, 2010;Bover-Arnal et al, 2011) must be summarized and discussed.…”

Section: Temporal and Spatial Distribution Of Lower Aptian Microencrumentioning

confidence: 99%

“…11). In the Basque-Cantabrian Basin, Najarro et al (2010) documented a Lithocodium/Bacinella facies that is stratigraphically placed before and in the aftermath of OAE 1a black-shale deposition, with a maximum abundance during the late Aptian.…”

Section: Temporal and Spatial Distribution Of Lower Aptian Microencrumentioning

confidence: 99%

Early Aptian algal bloom in a neritic proto-North Atlantic setting: Harbinger of global change related to OAE 1a?

Huck¹,

Heimhofer²,

Immenhauser³

2012

Geological Society of America Bulletin

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Pervasive growth of microencrusters (Lithocodium/Bacinella) characterizes shortlived stratigraphic intervals in Lower Aptianshallow-water carbonate platform settings of the central and southern Tethys. Although a causal relationship between this peculiar shallow-water facies and the early Aptian oceanic anoxic event (OAE) 1a seems likely, the temporal and spatial distributions of Lithocodium and Bacinella mass occurrences in the rock record point to a rather complex pattern. Possible controls include various global and regional drivers expressed in environmental perturbation of neritic ecosystems. Microencruster blooms have hitherto been reported to occur at the onset and in the aftermath of OAE 1a, slightly pre-or postdating the deposition of dark organic-rich black shales in pelagic basins. This study presents evidence for a punctuated and well-expressed early Aptian bloom of the ulvophycean green algae Lithocodium aggregatum observed at the proto-North Atlantic margin, Lusitanian Basin, Portugal. Similar to southern and central Tethyan sections, a Lithocodium-dominated interval temporally replaces the rudist-dominated platform ecosystem. This Lithocodium-rich horizon is composed of oncoidal fl oatstones and boundstones, including a well-exposed biohermal level, and reaches a thickness of up to 6 m. High-resolution carbon-isotope stratigraphy shown here clearly argues for Lithocodium to represent a biotic harbinger of environmental change in the run-up of OAE 1a. Chemo stratig raphy provides evidence that the subsequent carbonate platform breakdown in the proto-North Atlantic was coeval with an early Aptian carbonate platform drowning episode observed in the north-ern Tethys prior to OAE 1a. A regionally enhanced nutrient level and a relative sealevel rise are suggested to have triggered the transient mass occurrence of Lithocodium microencrusters, which also may have been infl uenced by elevated atmospheric CO 2 concentrations related to the emplacement of the Ontong Java large igneous province. Upwelling water masses and enhanced terrigenous runoff due to increased weathering may have served as possible sources of the required nutrients, which tentatively diminished and fi nally interrupted the metazoan carbonate platform factory.

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Major palaeoenvironmental perturbation in an Early Aptian carbonate platform: Prelude of the Oceanic Anoxic Event 1a?

Cited by 47 publications

References 72 publications

The uppermost Albian–lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera

The uppermost Albian–lower Cenomanian Bielba Formation of the type-area (Cantabria, northern Spain): facies, biostratigraphy, and benthic Foraminifera

Carbonate drowning successions of the Bird’s Head, Indonesia

Early Aptian algal bloom in a neritic proto-North Atlantic setting: Harbinger of global change related to OAE 1a?

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