In fact, in the case of the Lower Toarcian of Northwestern Europe, deposition of black shale facies, representatives of the postulated Toarcian Oceanic Anoxic Event (TOAE), coincides with the repopulation interval, after the major extinction event (Gomez and Goy, 2011) and not with the extinction event.
Al-Suwaidi, A.H., Angelozzi, G.N., Baudin, S.E., Damborenea, S.E., Hesselbo, S.P., Jenkyns, H.C., Mancenido, M.O., Riccardi, A.C., (2010): First record of the Early Toarcian Oceanic Anoxic Event from the Southern Hemisphere, Neuquen Basin, Argentina.
(2004) Carbon-isotope stratigraphy recorded by the CenomanianTuronian Oceanic Anoxic Event: correlation and implications based on three key localities.
(2011) submillennial resolution carbon isotope stratigraphy across the Oceanic Anoxic Event 2 horizon in the Tappu section, Hokkaido, Japan.
Abundant ammonites at the top of the section include a specimen identified as an Early Toarcian Harpoceras sp., which is related to the global oceanic anoxic event during the peak of transgression in the Early Jurassic .
The early Toarcian oceanic anoxic event, as defined by both relatively high TOC values and ammonite and nannofossil biostratigraphy, is clearly synchronous across Europe and undoubtedly prove to be so in global context, given its recent investigation in Argentina [12, 26-28].
(2011): Expression of an Oceanic Anoxic Event in a neritic setting: Lower Aptian coral rubble deposits from the western Maestrat Basin (Iberian Chain, Spain).
Biostratigrafia i aportacions a l'estudi del Oceanic Anoxic Event la.
During the mid-Cretaceous, dysoxic and anoxic conditions (oceanic anoxic events
: OAEs) developed in oxygen minimum zones along the continental margins of the tropical Tethys Sea, in restricted epicontinental seas, and in basins of the widening North and South Atlantic Ocean basins (Leckie et al, 2002).
10), but Hernandez-Romano, 1999 reported that the same bioevent also occurs in the Axaxacoalco and Zotoltitlan sections, and suggested that their abundance may be related to the Cenomanian-Turonian Oceanic Anoxic Event
. The abundance of calcisphaerulids was also observed in pelagic facies toward the western part of the basin in the Chichihualco section (Aguilera-Franco, 2000), 2m above the last appearance of several species of Rotalipora (uppermost Cenomanian).
Evolution of Cretaceous oceans includes several episodes of Oceanic Anoxic Events
(OAEs) that are particularly well recorded in [C.sub.organic]--rich sediments around the Tethys from the Early Jurassic (Borrego et al., 1996) up to the Cenomanian/Turonian (C/T) boundary time (Lamolda, 1978; Lamolda and Mao, 1999).
Known as oceanic anoxic events
(OAEs), nave occurred periodically during Earth's history, but none was more severe than that which occurred 93 [million years] ago, during the Cretaceous period,' wrote Timothy J Bralower of the Department of Geosciences at Pennsylvania State University in a 2008 article for Nature.