The neglected history of Oceanic Anoxic Event 1b; insights and new data from the Poggio le Guaine section (Umbria-Marche Basin)

Author(s): Coccioni, Rodolfo; Sabatino, Nadia; Frontalini, Fabrizio; Gardin, Silvia; Sideri, Marianna; Sprovieri, Mario
Author Affiliation(s): Primary:
Universita di Urbino, Dipartimento di Scienze della Terra, della Vita e dell'Ambiente, Urbino, Italy
Other:
CNRS-Université Paris VI, France
CNR, Istituto per l'Ambiente Marino Costiero, Italy
Volume Title: Stratigraphy
Source: Stratigraphy, 11(3-4), p.245-282. Publisher: Micropaleontology Press, New York, NY, United States. ISSN: 1547-139X
Note: In English. Includes appendices. 150 refs.; illus., incl. sketch maps, 5 plates, 2 tables, strat. cols.
Summary: The upper Aptian to lower Albian interval (∼114-109 Ma) represents a crucial period during Earth's history, with a major evolution in the nature of mid-Cretaceous tectonics, sea level, climate, and marine plankton communities. Interestingly, it also includes multiple prominent black shale horizons that are the sedimentary expression of oceanic anoxic event (OAE) lb. However, due to a set of geological, stratigraphic, and taxonomic challenges, difficulties constraining this OAE may sometimes result in inaccurate correlation. At Poggio le Guaine (central Italy), a continuous and undisturbed section of central western Tethyan pelagic sediments deposited during the latest Aptian and earliest Albian, complete with black shale horizons that record the OAElb carbon cycle perturbations, has provided a unique opportunity to address the shortcomings referred to above. High-resolution geochemical proxies (CaCO3, TOC, and δ13C), along with planktonic foraminifera and calcareous nannofossils, were used to establish an integrated and robust global stratigraphic framework in order to: (1) precisely correlate the prominent black shale horizons of OAElb in different marine environments (the Vocontian Basin in southeast France, Deep Sea Drilling Project Site 545 and Ocean Drilling Program Hole 1049C in the eastern and western North Atlantic, respectively); and (2) provide an effective tool to reconstruct, in high resolution, the paleobiological, paleoceanographic and paleoclimatic changes across the upper Aptian to lower Albian interval. The Poggio le Guaine section stands out as a valuable reference section for OAElb, its constituent subevents, and the δ13C record for the uppermost Aptian to lower Albian interval. The exceptional chemo- and biochronostratigraphic control allow direct comparison to the proposed candidate for the GSSP for the base of the Albian Stage at the Col de Pre-Guittard section in France.
Year of Publication: 2014
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Albian; Algae; Anaerobic environment; Aptian; Assemblages; Atlantic Ocean; Biodiversity; Biostratigraphy; Biozones; Blake Nose; Blake Plateau; C-13/C-12; Carbon; Chemostratigraphy; Climate change; Correlation; Cretaceous; DSDP Site 545; Deep Sea Drilling Project; Depositional environment; Dinoflagellata; Distribution; Europe; Event stratigraphy; Extinction; Foraminifera; France; IPOD; Invertebrata; Isotope ratios; Isotopes; Italy; Leg 171B; Leg 79; Lower Cretaceous; Marine environment; Marne a Fucoidi Formation; Mazagan Plateau; Mesozoic; Microfossils; Micropaleontology; Nannoconus; Nannofossils; North Atlantic; OAE 1; ODP Site 1049; Occurrence; Ocean Drilling Program; Oceanic anoxic events; Paleo-oceanography; Paleoclimatology; Paleoenvironment; Paleogeography; Palynomorphs; Plantae; Poggio le Guaine; Preservation; Protista; Reconstruction; Sea-level changes; Sedimentary rocks; Southern Europe; Stable isotopes; Succession; Taxonomy; Tethys; Umbria-Marches Basin; Vocontian Trough; Western Europe
Coordinates: N433300 N433300 E0123500 E0123500
Record ID: 2015104328
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.