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OAE 1a

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Series: GSA Special Papers
Published: 01 May 2015
DOI: 10.1130/2015.2511(16)
... ), in conjunction with radiolarian biostratigraphic data, we propose that a 1.3-m-thick interval within the examined section is correlative with Tethyan Selli Level (Apennines, Italy), a sedimentary expression of oceanic anoxic event (OAE) 1a. Specifically, the δ 13 C org record illustrates a discernible negative...
Journal Article
Journal: GSA Bulletin
Published: 01 November 2012
GSA Bulletin (2012) 124 (11-12): 1810–1825.
... 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...
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Journal Article
Journal: Geology
Published: 01 July 2012
Geology (2012) 40 (7): 583–586.
...Cinzia Bottini; Anthony S. Cohen; Elisabetta Erba; Hugh C. Jenkyns; Angela L. Coe Abstract The early Aptian Oceanic Anoxic Event (OAE 1a) resulted from an exceptional set of interactions between the geosphere, the biosphere, and the ocean-atmosphere system. We present new Re-Os data from two sites...
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Journal Article
Journal: Geology
Published: 01 April 2011
Geology (2011) 39 (4): 323–326.
...Wolfgang Kuhnt; Ann Holbourn; Michel Moullade Abstract The onset of the early Aptian oceanic anoxic event (OAE) 1a (ca. 120 Ma) coincided with a major perturbation of the carbon cycle, which is reflected in the sedimentary carbon isotope record. Triggering mechanisms, duration, and climatic...
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Journal Article
Journal: Geology
Published: 01 May 2014
Geology (2014) 42 (5): 439–442.
...Jörg Mutterlose; Cinzia Bottini; Stefan Schouten; Jaap S. Sinninghe Damsté Abstract The early Aptian was characterized by the widespread occurrence of anoxia in the oceans, known as Oceanic Anoxic Event (OAE) 1a. Intense degassing from submarine volcanic plateaus presumably resulted in high...
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Journal Article
Journal: Geosphere
Published: 11 February 2021
Geosphere (2021) 17 (2): 501–519.
...W. Dummann; C. Schröder-Adams; P. Hofmann; J. Rethemeyer; J.O. Herrle Abstract The Early Cretaceous oceanic anoxic event (OAE) 1a documents a major perturbation of the global carbon cycle with severe consequences for the ocean-climate-biosphere system. While numerous studies over the past decades...
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Journal Article
Journal: Geology
Published: 01 January 2017
Geology (2017) 45 (1): 63–66.
...Guillaume Charbonnier; Karl B. Föllmi Abstract The early Aptian recorded one of the most significant episodes of environmental change during the Mesozoic—the Selli oceanic anoxic episode (OAE 1a). It has often been suggested that magmatic activity related to the emplacement of the Greater Ontong...
Journal Article
Journal: Geology
Published: 01 November 2016
Geology (2016) 44 (11): 959–962.
...B.D.A. Naafs; R.D. Pancost Abstract Atmospheric CO 2 possibly doubled during Oceanic Anoxic Event (OAE) 1a, likely in response to submarine volcanic outgassing. Despite being important for our understanding of the consequences of carbon cycle perturbations, the response of the climate system...
Journal Article
Journal: Geology
Published: 16 December 2020
Geology (2021) 49 (5): 515–519.
...Jiuyuan Wang; Andrew D. Jacobson; Bradley B. Sageman; Matthew T. Hurtgen Abstract Large igneous province (LIP) eruptions are hypothesized to trigger biocalcification crises. The Aptian nannoconid crisis, which correlates with emplacement of the Ontong Java Plateau and Oceanic Anoxic Event 1a (OAE...
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Journal Article
Journal: Geology
Published: 01 June 2017
Geology (2017) 45 (6): 543–546.
...) are here correlated to stratigraphically well calibrated Tethyan sections, constraining the end of major evaporite deposition in the South Atlantic to the early Aptian Oceanic Anoxic Event (OAE) 1a interval. The unusually extensive evaporite deposition would have reduced the global dissolved sulfate...
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... of the Hedbergella excelsa planktonic foraminiferal zone and in the upper part of the Chiastozygus litterarius (NC6) calcareous nannofossil zone. Stable carbon (δ 13 C) and oxygen (δ 18 O) isotopes indicate a chemostratigraphy of the PLG core with the signature of oceanic anoxic event 1a (OAE 1a...
Series: GSA Special Papers
Published: 01 May 2015
DOI: 10.1130/2015.2511(17)
... Among various paleoenvironmental proxy records across the lower Aptian Selli Level (Umbria-Marche basin, Italy) and its equivalents (i.e., sedimentary expressions of oceanic anoxic event [OAE] 1a), one very intriguing feature is a prominent negative δ 13 C excursion at the base...
Journal Article
Journal: Palynology
Published: 01 July 2016
Palynology (2016) 40 (2): 230–246.
... Formation (Tithonian–lowermost Aptian) and the polychrome marls of the Marne a Fucoidi Formation (Aptian–Albian). The Oceanic Anoxic Event 1a (OAE 1a) anoxic horizon (Selli Level) is located in the latter formation. Here, we report for the first time a palynostratigraphical assessment of this key section...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications