Regional record of a global oceanic anoxic event: OAE1a on the Apulia Platform margin, Gargano Promontory, southern Italy

Patterns in the distribution of Aptian rudists and corals within a sequence-stratigraphic framework (Maestrat Basin, E Spain)

“…On the other hand, lowstand carbonate platforms commonly correspond to a bottom massive thick bed (up to few tens-of-metres thickness), which is capped by a drowning surface (i.e., hardground) and/or evolves upwards to decimetre to metre thick retrograding strata and/or to basin marls (Bover-Arnal et al, 2009, 2011a, 2014 Caprinidae disappeared from the Tethyan and Atlantic regions at the boundary between the Early and Late Aptian (Masse, 1989;Skelton and Gili, 2012). Caprinid lithosomes of late Early Aptian age are rare in carbonate platform deposits formed on the northern margin of the Tethys (Skelton and Gili, 2012), but common in those of isolated central Tethyan platforms such as the Southern Apennines (D'Argenio et al, 1992;Masse et al, 1993;Carannante et al, 2009), Apulia (Masse, 1992;Graziano, 1999Graziano, , 2000Graziano, , 2013Luciani et al, 2006) and Adriatic…”

Environmental consequences of Ontong Java Plateau and Kerguelen Plateau volcanism

“…The Selli Level in the Umbria-Marche Basin (Coccioni et al, 1987 is the lithostratigraphic unit established to best typify OAE 1a. Selli Level equivalents have been described in other sedimentary basins where lithological characteristics are slightly to moderately different (e.g., Bersezio, 1993;Menegatti et al, 1998;Larson and Erba, 1999;Luciani et al, 2001Luciani et al, , 2006Bellanca et al, 2002). Coeval and lithologically similar intervals are the Goguel Level in southeastern France (Bréhéret, 1997), and the Fischschiefer in the Lower Saxony Basin (Kemper and Zimmerle, 1978;Gaida et al, 1981;Mutterlose, 1992).…”

Geochemistry, palaeoenvironments and timing of Aptian organic-rich beds of the Paja Formation (Curití, Eastern Cordillera, Colombia)

“…In addition to organic-rich shale levels associated with OAE-1a in western Europe (Goguel, Selli, Fischschiefer levels), localized organic-rich shales are also associated with intervals C7 and C8 in the Vocontian Basin (Noire and Fallot levels; Herrle et al 2004;Herrle et al 2010), the Gargano Promontory (Luciani et al 2006), the Basque -Cantabrian region (Millán et al 2008) and the Prebetic and Subbetic ranges (de Gea et al 2003(de Gea et al , 2008a.…”

“…OAE-1a is characterized by a widespread deep-sea anoxia that developed in a global context of intense volcanic activity in the Pacific (Larson 1991;Méhay et al 2009;Tejada et al 2009), high oceanic surface water temperatures with a reduced equator-to-poles thermal gradient (Frakes 1999;Pucéat et al 2003), and generalized high sea level (Haq et al 1987;Skelton 2003), as well as increased marine primary productivity (Dumitrescu & Brassell 2005;Luciani et al 2006;de Gea et al 2008b;Heldt et al 2008). The overall global carbon isotopic signature of OAE-1a has been identified by a strong negative peak (stage C3), followed by two rapid positive excursions (stages C4 and C6) separated by a period of high constant isotopic values (C5) (Menegatti et al 1998).…”