Progressive palaeoenvironmental change during the Late Barremian–Early Aptian as prelude to Oceanic Anoxic Event 1a: Evidence from the Gorgo a Cerbara section (Umbria-Marche basin, central Italy)

AbstractThe Oceanic Anoxic Event (OAE) 1b is well documented in western Tethys, however, records in Eurasia are still lacking. Here, we carried out high-resolution organic carbon isotope (δ13Corg), total organic carbon (TOC) contents and mercury (Hg) concentrations analysis of the lacustrine sediments from the Xiagou and Zhonggou formations in the Hanxiagou section, Jiuquan Basin, northwestern China. The lacustrine δ13Corg curve presents three stages of negative excursions above the basalt layer dated at 112.4 ± 0.3 Ma in the lowermost Zhonggou Formation. The three negative δ13Corg excursions, well corresponded with the three subevents (Kilian, Paquier, and Leenhardt) of the OAE1b in Poggio le Guaine (central Italy), Vocontian Basin (SE France) and St Rosa Canyon (NE Mexico) sections, supporting the record of the terrestrial OAE 1b in the Jiuquan Basin. Five mercury enrichment (ME) intervals in Hg/TOC ratios were recognized, indicating that the pulsed volcanism from the southern Kerguelen Plateau likely triggered the OAE 1b. However, the decoupling between NIE shifts and mercury enrichments signifying other carbon reservoir (with no link to mercury) probably contributed to the global carbon cycle perturbation during the OAE 1b period. Our results provide direct evidence to link the OAE 1b and terrestrial ecosystem in the Eurasia.

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Patterns of local and global redox variability during the Cenomanian–Turonian Boundary Event (Oceanic Anoxic Event 2) recorded in carbonates and shales from central Italy

Sedimentology ◽

10.1111/sed.12352 ◽

2017 ◽

Vol 64 (1) ◽

pp. 168-185 ◽

Cited By ~ 25

Author(s):

Jeremy D. Owens ◽

Timothy W. Lyons ◽

Dalton S. Hardisty ◽

Chris M. Lowery ◽

Zunli Lu ◽

...

Keyword(s):

Central Italy ◽

Oceanic Anoxic Event ◽

Oceanic Anoxic Event 2 ◽

Anoxic Event

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Palaeoepidemiology in extinct vertebrate populations: factors influencing skeletal health in Jurassic marine reptiles

Royal Society Open Science ◽

10.1098/rsos.190264 ◽

2019 ◽

Vol 6 (7) ◽

pp. 190264 ◽

Cited By ~ 2

Author(s):

Judith M. Pardo-Pérez ◽

Benjamin Kear ◽

Erin E. Maxwell

Keyword(s):

A Priori ◽

Skeletal Health ◽

Oceanic Anoxic Event ◽

Skeletal Injury ◽

Individual Health ◽

Marine Reptiles ◽

Factors Influencing ◽

Palaeoenvironmental Change ◽

Anoxic Event ◽

Ecosystem Level

Palaeoepidemiological studies related to palaeoecology are rare, but have the potential to provide information regarding ecosystem-level characteristics by measuring individual health. In order to assess factors underlying the prevalence of pathologies in large marine vertebrates, we surveyed ichthyosaurs (Mesozoic marine reptiles) from the Posidonienschiefer Formation (Early Jurassic: Toarcian) of southwestern Germany. This Formation provides a relatively large sample from a geologically and geographically restricted interval, making it ideal for generating baseline data for a palaeoepidemiological survey. We examined the influence of taxon, anatomical region, body size, ontogeny and environmental change, as represented by the early Toarcian Oceanic Anoxic Event, on the prevalence of pathologies, based on a priori ideas of factors influencing population skeletal health. Our results show that the incidence of pathologies is dependent on taxon, with the small-bodied genus Stenopterygius exhibiting fewer skeletal pathologies than other genera. Within Stenopterygius , we detected more pathologies in large adults than in smaller size classes. Stratigraphic horizon, a proxy for palaeoenvironmental change, did not influence the incidence of pathologies in Stenopterygius . The quantification of the occurrence of pathologies within taxa and across guilds is critical to constructing more detailed hypotheses regarding changes in the prevalence of skeletal injury and disease through Earth history.

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High-resolution chemostratigraphy of the late Aptian–early Albian oceanic anoxic event (OAE 1b) from the Poggio le Guaine section (Umbria–Marche Basin, central Italy)

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2015.03.009 ◽

2015 ◽

Vol 426 ◽

pp. 319-333 ◽

Cited By ~ 19

Author(s):

Nadia Sabatino ◽

Rodolfo Coccioni ◽

Daniela Salvagio Manta ◽

François Baudin ◽

Mattia Vallefuoco ◽

...

Keyword(s):

High Resolution ◽

Central Italy ◽

Oceanic Anoxic Event ◽

Anoxic Event

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THE USE OF CARBON AND OXYGEN STABLE ISOTOPES IN THE STUDY OF GLOBAL PALAEOCEANOGRAPHIC CHANGES: EXAMPLES FROM THE CRETACEOUS SEDIMENT ROCKS OF WESTERN GREECE

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.18445 ◽

2006 ◽

Vol 39 (1) ◽

pp. 64 ◽

Cited By ~ 1

Author(s):

V. Karakitsios ◽

H. Tsikos ◽

K. Agiadi - Katsiaouni ◽

S. Dermitzoglou ◽

E. Chatziharalambous

Keyword(s):

Stable Isotopes ◽

Oceanic Anoxic Event ◽

Palaeoenvironmental Change ◽

Oxygen Stable Isotopes ◽

Anoxic Event ◽

Data Record ◽

Anoxic Events ◽

First Time ◽

Western Greece ◽

Cretaceous Sediment

In the present paper we examine the use of carbon and oxygen stable isotopes in the study of global palaeoceanographic changes, with special reference to the oceanic anoxic events (OAEs). The analysis of stable isotopes was applied to the examination of Cretaceous sediments from the Ionian and Pindos zones of Western Greece. In the Ionian zone the carbon and oxygen stable isotopes, combined with biostratigraphic data, record the palaeoenvironmental change corresponding to the anoxic events Bonarelli (Cenomanian/Turonian, OAE2) and Paquier (Lower Albian, OAE1b). In the Pindos zone, within the Cretaceous sediments, we observed two organic-carbon-rich levels. According to the biostratigraphic and isotopie analysis, the first level corresponds to an OAE of Santonian age. This local oceanic anoxic event is described for the first time. The second level, Aptian - Albian age, possibly correlates to either the Paquier event (OAE 1b) or the Selli event (OAE 1a), which in Greece were until now known only in the Ionian zone.

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