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2023
The Paleocene-Eocene Thermal Maximum (PETM) was identified for the first time in two sections (Bongue and Dibamba) from the Douala sub-basin located in the Gulf of Guinea, Cameroon. This discovery was based on a multi-disciplinary approach including biostratigraphy and occurrence of benthic and planktic foraminifera and ostracods, major and trace…
2023
During the last decades, Egypt became a focal point for studying the climate and paleoenvironmental changes during the late Paleocene early of Eocene that is known as the Paleocene-Eocene Thermal Maximum (PETM). This chapter sheds light on the climatic and paleoenvironmental changes recorded from the Egyptian sedimentary record, based on:…
2021
The publisher regrets that the Fig. 3 was wrongly positioned in place of Fig. 4 and Fig. 4 in place of Fig. 3 in the published article. It has been corrected in the online version. Please refer the correct figures below: Also, the citation to Fig. 3 in section 3.4 of the text was erroneously deleted on two occasions. They should read as below: The…
2021

We report the Narmada Seaway began in India during the largest global sea-level transgression and Oceanic Anoxic Event 2 (OAE2) δ13C excursion during the late Cenomanian to early…

anoxic event, pubs
2021

Early Eocene rift basins sediments in western and northwestern India contain deposits including lignite. These rift basins were formed during the early stage of the India - Eurasia collision. The Sedimentary successions in the studied five lignite mines are stratigraphically similar. In these successions, there are two thick lignite units,…

2020

Mercury (Hg) anomalies linked to Large Igneous Provinces (LIP) volcanism have been identified in sediments across all five major mass extinctions in Earth's history. This study tests whether Hg in marine sediments is a reliable proxy linking Deccan Traps volcanic eruptions to late Maastrichtian global climate warming and the mass extinction at…

deccan volcanism, KTB, mass extinction, pubs
2019

This volume covers new developments and research on mass extinctions, volcanism, and impacts, ranging from the ancient Central Iapetus magmatic province linked with the Gaskiers glaciation to thermogenic degassing in large igneous provinces, the global mercury enrichment in Valanginian sediments, and the Guerrero-Morelos carbonate platform…

book, deccan volcanism
2019

The end-Cretaceous mass extinction (66 Ma) has long been associated with the Chicxulub impact on the Yucatan Peninsula. However, consensus on the age of this impact has remained controversial because of differing interpretations on the stratigraphic position of Chicxulub impact spherules relative to the mass extinction horizon. One side argues…

chicxulub pubs, pubs
2019

The Cretaceous-Paleocene (K/P) boundary intervals are rarely preserved in successions of shallow-water limestones. Here, we describe a shallow rocky shore on the active orogenic wedge of the eastern Alps (Austria) fringed by a carbonate platform that was largely cannibalized by erosion. We compared this succession with similar nearshore…

pubs, anoxic event
2019

Temporal correlation between some continental flood basalt eruptions and mass extinctions has been proposed to indicate causality, with eruptive volatile release driving environmental degradation and extinction. We tested this model for the Deccan Traps flood basalt province, which, along with the Chicxulub bolide impact, is implicated in the…

pubs, deccan volcanism, KTB
2018

We conducted detailed rock magnetic, mineralogical and geochemical (mercury) analyses spanning the Cretaceous–Paleogene boundary (KPB) at Zumaia, Spain, to unravel the signature of Deccan-induced climate and environmental changes in the marine sedimentary record. Our biostratigraphic results show that Zumaia is not complete, and lacks the…

anoxic event, deccan volcanism, pubs
2018

The Cenomanian–Turonian Oceanic Anoxic Event (OAE2; ~94.5 million years ago) represents an episode of global-scale marine anoxia and biotic turnover, which corresponds to one of the warmest time intervals in the Phanerozoic. Despite its global significance, information on continental ecosystem response to this greenhouse episode is lacking…

pubs, anoxic events, climate events
2018

The Cretaceous-Paleogene boundary (KPB) mass extinction (~66.02 Ma) and the Paleocene-Eocene Thermal Maximum( PETM)(~55.8Ma) are two remarkable climatic and faunal events in Earth's history that have implications for the current Anthropocene global warming and rapid diversity loss. Here we evaluate these two events at the stratotype localities…

pubs, deccan volcanism, climate events, KTB
2018

We conducted detailed rock magnetic, mineralogical and geochemical (mercury) analyses spanning the Cretaceous–Paleogene boundary (KPB) at Zumaia, Spain, to unravel the signature of Deccan-induced climate and environmental changes in the marine sedimentary record. Our biostratigraphic results show that Zumaia is not complete, and lacks the…

pub, deccan volcanism, KTB
2017

Korbar, McDonald, Fućek, Fuček, and Posilović (2017) report a tsunamite, triggered by the Chicxulub impact on Yucatan, from the Likva Cove carbonate platform of the Island of Brač, Croatia, which is similar to that in an earlier report from the nearby Island of Hvar (Korbar et al., 2015). If true, such deposits in the Adriatic Sea would be…

pubs, chicxulub pubs
2017
Both the Chicxulub bolide impact and the Deccan Traps large igneous province have been implicated as contributing to the end-Cretaceous mass extinction. However, linking these events to the stratigraphic record of biotic and climatic change around the extinction, and assessing their potential effects, requires precise temporal constraints.. To…
abstracts
2017

Mercury is a very toxic element, with a long residence time (1-2 years) and wide distribution by aerosols. Volcanic emissions and coal combustion are the two main natural sources of mercury. Several studies [1-4] evaluated the relationship between Hg anomalies in sediments and LIP activity across mass extinction horizons. The bulk (80%) of…

abstracts
2017

Recent studies indicate that the bulk (80%) of Deccan trap eruptions occurred over a relatively short time interval in magnetic polarity C29r. U-Pb zircon geochronology shows that the main phase-2 began 250 ky before the Cretaceous-Tertiary (KT) mass extinction and continued into the early Danian suggesting a cause-and-effect relationship…

abstracts
2017

The Deccan Traps Magmatic Province coincides with the Cretaceous-Paleogene (KPg) boundary and probably contributed to the associated mass extinctions by inducing rapid and abrupt climate changes, including continental and superficial seawater acidification. However, how such environmental acidification is expressed in the marine sedimentary…

abstracts
2017

The Cretaceous-Paleogene boundary (KPB) mass extinction (~ 66.02 Ma) and the Paleocene-Eocene Thermal Maximum (PETM) (~ 55.8 Ma) are two remarkable climatic and faunal events in Earth's history that have implications for the current Anthropocene global warming and rapid diversity loss. Here we evaluate these two events at…

pubs, deccan volcanism, KTB, climate events
2017

The Cenomanian-Turonian boundary witnessed major perturbations in global biogeochemical cycling, oceanography and climate expressed in the widespread deposition of organic-rich marine shales (OAE2) and a pronounced positive carbon isotope excursion (CIE). Despite the global significance of this event, information on the dynamics of continental…

abstracts
2017

Planktic foraminiferal analysis, including species populations, diversity trends, high-stress indices and stable isotopes of the latest Campanian through Maastrichtian in the South Atlantic, Tethys and Indian oceans reveal four major climate and faunal events that ended with the Cretaceous-Paleogene (K/Pg), formerly Cretaceous-Tertiary (K/T),…

pubs, deccan volcanism, KTB
2017

The Paleocene-Eocene Thermal Maximum (PETM, ≈55.8±0.2 Ma) is marked by a global change in carbon cycle and rapid warming. Climate warming persisted for several tens of thousands of years and resulted in rapid diversification in terrestrial mammals and marine planktic foraminifera.

Deep-water benthic foraminifera suffered a mass…

abstracts
2017
Mercury is a very toxic element, with a long residence time (1-2 years) and wide distribution by aerosols. Several studies evaluated the relationship between Hg anomalies in sediments and LIP activity across mass extinction horizons. The bulk (80%) of Deccan Trap eruptions occurred over a relatively short time interval in magnetic polarity C29r…
abstracts
2017
Persistent high stress environmental conditions and over 1 Myr delayed recovery in planktic foraminiferal communities in the aftermath of the end-Cretaceous mass extinction have been linked to continued Deccan volcanism activity in India. In addition, the Dan-C2 hyperthermal event in the early Danian (planktic foraminiferal zone P1b) has been…
abstracts
2017
The onset of Deccan main phase eruptions is estimated at the base of chron C29r, ~250 ky before the Cretaceous-Paleogene boundary (KTB or K-Pg or KPB). Lava mega-flows reaching eastern India stratigraphically underlie the KPB, standing testimony for peak volcanism preceding/straddling the KPB mass extinction. High-flux injections of thousands of…
abstracts
2017

Mercury (Hg) as indicator of large-scale volcanism in marine sediments provides new insights into relative timing between biological and environmental changes, mass extinctions and delayed recovery. We analyzed Hg concentrations linked to Deccan volcanism, TOC, δ13C, δ18O and faunal changes for C29r that spans 250 ky below the Cretaceous…

abstracts
2016

The discovery of a new Cretaceous/Palaeogene (K/Pg) bathyal marine sequence on Gorgonilla Island, SW Colombia, extends the presence of Chicxulub impact spherule deposits to the Pacific region of northern South America and to the Eastern Pacific Ocean. The Gorgonilla spherule layer is approximately 20 mm thick and consists of extraordinarily…

pubs, anoxic event
2016

The contribution of the Deccan Traps (west-central India) volcanism in the Cretaceous-Paleogene (KPg) crisis is still a matter of debate. Recent U-Pb dating of zircons interbedded within the Deccan lava flows indicate that the main eruptive phase (>1.1 × 106 km3 of basalts) initiated ∼250 k.y. before and ended ∼500 k.y. after the…

pubs, deccan volcanism
2016

The late Maastrichtian was a time of major climate, evolution and extinction extremes. Rapid climate warming of 2–3 °C in intermediate waters between 69.5 and 68 Ma (top C31r to base C30n) accompanied maximum evolutionary diversification (43% increase, zone CF5 to low CF4) in planktic foraminiferal history, followed immediately by a…

pubs, deccan volcanism, KTB
2016

We thank Jan Smit and colleagues (Smit et al., 2016) for giving us the opportunity to clarify some important points in our original manuscript (Font et al., 2016a) and to discuss the issues raised in their Comment. Their main critique centers on the origin of the mercury anomalies, which they argue are post-depositional and cannot be assigned…

pubs, deccan volcanism
2016

Late Maastrichtian through middle Eocene planktic foraminiferal biostratigraphy and erosion patterns from three Cauvery basin wells are compared with the Krishna-Godavari basin, Madagascar and South Atlantic Site 525A. Maastrichtian sedimentation appears continuous at DSDP site 525A and substantially complete in the Cauvery basin and Madagascar…

pubs, deccan volcanism, climate events
2016

The age of the Chicxulub impact is still controversial. Impact spherules found at or near the Cretaceous-Paleogene boundary (KPB) in the North Atlantic, Caribbean, Belize and Guatemala are reworked in early Danian sediments above a KP hiatus [1-3]. But, in NE Mexico and Texas where impact spherules are beyond erosion by the Gulf Stream, they…

abstracts
2016

Glass spherules are a common occurrence around the Cretaceous-Paleogene (KPG) boundary in the stratigraphic record throughout the Caribbean and North Atlantic and are widely thought to represent tektites produced by the Chicxulub impact [1,2]. A new example, which contains some of the largest individual spherules yet found (typically 0.5–1.5 mm…

abstracts
2016

Preliminary results show poor planktic foraminifer test preservation in the top ~1 m (zone CF1) at Agost, correlative with high-stress conditions preceding the mass extinction horizon at Bidart, Gamsbach and Elles (Tunisia). Correlative zone CF1 sediments in the eastern Tethys (Egypt, Israel) show inverse correlation between carbonate…

abstracts
2016

Deccan Volcanic Province erupted ~80% of the total volume during C29r flooding the Indian continent with ~1.5 million km3 of lava that forms >3000 m high mountains. The base of C29r was recently dated (U-Pb) at ~66.250 Ma [1] and the Cretaceous-Paleogene boundary (KPB) at 66.043 Ma [2]. Volcanic eruptions released tens of thousands of…

abstracts
2016

Mercury is a very toxic element, with a long residence time (1-2 years) and wide distribution by aerosols. Volcanic emissions and coal combustion are the two main natural sources of mercury. Several studies [1-4] evaluated the relationship between Hg anomalies in sediments and LIP activity across mass extinction horizons. The bulk (80%) of…

abstracts
2016

The Paleocene-Eocene Thermal Maximum (PETM, ~55.8±0.2 Ma) is marked by a global drop of 2-6‰ in δ13C values and rapid warming of 4-5°C in tropical surface waters and 4-8°C in high latitudes. Climate warming persisted for several tens of thousands of years and resulted in rapid diversification in terrestrial mammals…

abstracts
2016

Recent studies indicate that ~80% of Deccan Traps erupted over ~750 ky in magnetic polarity C29r. U-Pb zircon geochronology shows that the main phase began 250 ky before the Cretaceous-Tertiary (KT) mass extinction and continued for 500 ky into the early Danian, suggesting played a role in the mass extinction. Many lava flows are separated by…

abstracts
2016

Today it is virtually unthinkable to solve complex geologic problems without biostratigraphy based on microfossils, whether for relative age control or environmental proxies. This is amply demonstrated for the end-Cretaceous (KTB) mass extinction where radiometric dating cannot decipher the order of events because they fall within dating error…

abstracts
2016

The discovery of a new Cretaceous/Palaeogene (K/Pg) bathyal marine sequence on Gorgonilla Island, SW Colombia, extends the presence of Chicxulub impact spherule deposits to the Pacific region of northern South America and to the Eastern Pacific Ocean. The Gorgonilla spherule layer is approximately 20 mm thick and consists of extraordinarily…

pubs, chicxulub pubs
2016

Mass extinctions generally involve a complex array of interrelated causes and are best evaluated by a multi-proxy approach as applied here for the end-Cretaceous mass extinction. This study documents and compares the planktic foraminiferal records, carbonate dissolution effects, stable isotopes, and magnetic susceptibility in France (Bidart),…

pubs, KTB
2016

Deep-sea sections in the North Atlantic are claimed to contain the most complete sedimentary records and ultimate proof that the Chicxulub impact is Cretaceous-Tertiary boundary (KTB) in age and caused the mass extinction. A multi-disciplinary study of North Atlantic DSDP Sites 384, 386 and 398, based on high-resolution planktonic foraminiferal…

pubs, chicxulub pubs
2015

Deccan Traps erupted in three main phases with 6% total Deccan volume in phase-1 (C30n), 80% in phase-2 (C29r) and 14% in phase-3 (C29n). Recent studies indicate that the bulk (80%) of Deccan trap eruptions (Phase-2) occurred over a relatively short time interval in magnetic polarity C29r. U-Pb zircon geochronology shows that the main Phase 2…

abstracts
2015

The discovery of a new Cretaceous/Paleogene (K/Pg) bathyal marine sequence on Gorgonilla Island, SW Colombia, extends the presence of Chicxulub spherule deposits to northern South America and to the Eastern Pacific Ocean. At the time of the Chicxulub impact, Gorgonilla was located approximately 2700-3000 km SW of the impact site.

The…

abstracts
2015

The Paleocene-Eocene Thermal Maximum (PETM) shows an extraordinary drop in the δ13C of carbonate and organic matter across the globe, suggesting massive release of 13C-depleted carbon dioxide into the ocean and atmosphere over a very short time interval (probably < 20ky). We report a geochemical and mineralogical study of 106…

pubs, climate events
2015

Highly diversified planktic foraminiferal assemblages (~65 species) prevailed in the early late Maastrichtian (mid C31n, ~68.8 Ma) at the South Atlantic DSDP Site 525A. A rapid warming (~2°C deep water) at the base CF4/ top C31n is associated with carbonate dissolution and enhanced planktic test-fragmentation indicative of ocean acidification…

abstracts
2015

The cause for the end-Cretaceous mass extinction (KTB) has long been attributed solely to the Chicxulub impact based on two major assumptions: (1) the Chicxulub impact trumped any earth-derived potential cause, and (2) Deccan volcanism played no significant role. Both of these assumptions have been challenged in recent years based on evidence…

abstracts
2015

The Maastrichtian (C31-C30n) was a time of major environmental changes that record evolutionary diversification in planktic foraminifera as well as a minor extinction associated with climate change and high carbonate dissolution. Although these changes have been observed worldwide, their cause(s) remain speculative. Here we report on these…

pubs, deccan volcanism