The Barremian-Aptian boundary in the Poggio le Guaine core (central Italy): Evidence for magnetic polarity Chron M0r and oceanic anoxic event 1a

Mid-Cretaceous marine Os isotope evidence for heterogeneous cause of oceanic anoxic events

“… a Umbria–Marche Basin: lithology, biostratigraphy, biostratigraphy, and geochemical data are from Coccioni et al 8 , 12 , Coccioni and Premoli Silva 9 , Coccioni 65 , Turgeon and Creaser; 19 Tejada et al 20 , Li et al 27 , Savian et al 28 , Matsumoto et al 13 , 16 , Percival et al 29 , and this study. b ODP Site 763B: lithology, biostratigraphy, and geochemical data are from Haq et al 30 , Bralower et al 35 , and this study.…”

Supplemental Material: Long-term Aptian marine osmium isotopic record of Ontong Java Nui activity

“…The Upper Barremian to lowermost Aptian interval belongs to the Maiolica Formation and consists of white limestone with cyclic intercalation of black shale layers (Fig. 2) (Coccioni et al, 2012;Savian et al, 2016). The ~2 m-thick organicrich Selli Level, which is the regional expression of OAE1a, occurs at the base of the Marne a Fucoidi Formation (0 m in Fig.…”

Supplemental Material: Long-term Aptian marine osmium isotopic record of Ontong Java Nui activity

“…The upper Barremian to lowermost Aptian interval belongs to the Maiolica Formation and consists of white limestone with cyclic intercalation of black shale layers (Fig. 2) (Coccioni et al, 2012;Savian et al, 2016). Since the Global Stratotype Section and Point for the base of the Aptian Stage has not yet been defined, the Barremian-Aptian boundary here is provisionally placed in the uppermost part of the Globigerinelloides aptiensis planktonic foraminiferal Zone based on recent findings (Coccioni, 2020) at the Gorgo a Cerbara section (Figs.…”