Chemostratigraphy Across the Cretaceous‐Paleogene (K‐Pg) Boundary

Sial, Alcídes N.; Chen, Jiubin; Lacerda, Luis Drude de; Higgins, John A.; Tewari, V. C.; Gaucher, Claudio; Ferreira, Valderez P.; Cirilli, Simonetta; Korte, Carsten; Barbosa, José Antônio; Pereira, Natan Silva; Ramos, Danielle Santiago

doi:10.1002/9781119382508.ch12

Cited by 8 publications

(16 citation statements)

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“…16). In conclusion, a global paleogeographic map for the Cretaceous -Tertiary boundary based on the distribution of the mercury, carbon and oxygen isotopes in different sections of the northern and southern hemisphere has been established which suggest that the major issue of the mass extinction is due to Deccan volcanism at Cretaceous -Tertiary boundary (Sial et al, , 2019Tewari, 2019 and references therein).…”

Section: Cretaceous -Tertiary Boundary Chemostratigraphy In Meghalaya...mentioning

confidence: 94%

“…The Um Sohryngkew section of Meghalaya, NE India, located 800-1000 km from the Deccan volcanic province is one of the most complete Cretaceous-Paleogene boundary (KTB) transitions worldwide with strong evidence of mass extinction of planktoic foraminifera, larger ammonoids and other fossils, first appearance of Danian foraminiferal species, negative shift in the δ 13 C , KTB red clay layer wth Ir anomaly of 12 ppb (Sial et al, , 2019Tewari and Sial, 2015;Tewari, 2019 and references therein). Geological map of the Cretaceous-Tertiary and Paleocene -Eocene sections around Um Sohryngkew river, Shillong Plateau, Meghalaya, NE India is shown in Figure 14 (Tewari et al, 2010a,b).…”

Section: Cretaceous -Tertiary Boundary Chemostratigraphy In Meghalaya...mentioning

confidence: 99%

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An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

Tewari

2023

Journal of Nepal Geological Society

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The existence of Rodinia Supercontinent during Meso-Neoproterozoic and its subsequent breakup and reassembly as Gondwana Supercontinent is a widely accepted hypothesis in geological history of the Earth. The breakup of the Rodinia resulted in formation of rift basins and passive continental margins around 650 Ma. Major palaeoclimatic events like Neoproterozoic global glaciation (Snowball Earth) followed by global warming have been recorded from different continents including Indian Lesser Himalaya (Blaini -Krol Cryogenian-Ediacaran Period). The emergence of multicellular Ediacaran life in the Upper Krol Formation is consistent with an increase in the atmospheric oxygen. The base of Ediacaran System in the Lesser Himalaya is established in the cap carbonate, the Blaini Formation overlying the glacial diamictites (Blainian). The pink cap carbonate of the Blaini Formation shows negative δ13C value (-3‰ PDB) and invariably correlate with the Marinoan glacial event. Large continents of Gondwanaland Supercontinent South America, Africa, India, Australia and Antarctica were located over the South Polar region and global equatorial to polar oceanic circulation was blocked and may have been the main cause of glaciation. Paleogeographically Carboniferous–Permian diamictite, coal beds and plant fossil bearing Gondwana outcrops are found in South Sikkim and Arunachal Lesser Himalaya of Northeast India. The Late Paleocene – Middle EoceneTethyan foraminiferal – algal carbonate biofacies are well developed after Late Cretaceous – Paleogene mass extinction event in the eastern Tethys, Meghalaya, east India. These Tethyan benthic orthophragmine foraminiferal –algal limestones were deposited in the passive continental margin setting of a shallow marine carbonate shelf in eastern Tethys and Standard Benthic Zones (SBZ) of the Alpine- Adriatic western Tethys are recorded from Meghalaya. The Cretaceous – Tertiary boundary is well marked in these basins by biotic mass extinction. Late Cretaceous mega ammonoid fossils and Sauropod dinosaur bones are abundantly found in the Maastrichtian Mahadeo Formation. The present δ13C and δ18O isotope data is comparable with the marine values of the limestone The Umlatodoh Limestone contains foraminiferal taxa of early Ilerdian and Middle Eocene (early Lutetian) age. The Indo-Myanmar Orogenic Belt (IMOB) represents the eastern suture of Indian plate and it was formed due to the collision of the Indian plate with the Myanmar plate. The Naga-Manipur ophiolites have been assigned to range in age from Upper Cretaceous to Eocene on the basis of faunal assemblages (radiolarian, planktonic foraminefera) in the olistolithic blocks of pelagic limestone and cherts. Pan Indian Pre and Post India–Asia Collision, emergence of Himalaya and Paleogeography of the Indian Subcontinent has been discussed in South Asia.

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Section: Cretaceous -Tertiary Boundary Chemostratigraphy In Meghalaya...mentioning

confidence: 94%

Section: Cretaceous -Tertiary Boundary Chemostratigraphy In Meghalaya...mentioning

confidence: 99%

An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

Tewari

2023

Journal of Nepal Geological Society

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“…9C). In contrast, marine K-Pg sites show trace element patterns that lack a relative HREE enrichment (see e.g., Ebihara and Miura, 1996;Shrivastava et al, 2013;Loroch et al, 2016;Sial et al, 2018). This shows a strong contrast between the trace element enrichments of the extinction horizon at Čanj to that of K-Pg sections.…”

Section: A Further Examination Of the Terrestrial Signalmentioning

confidence: 98%

The End-Triassic Extinction as Recorded in the Deep-Sea Archive of the Budva Basin, Dinarides, Montenegro

Graaff¹,

Percival²,

Déhais³

et al. 2022

SSRN Journal

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“…Climatic/ecologic changes and post K-Pg recovery dynamics in terrestrial settings were also strongly influenced by site-specific factors such as latitude, distance from the Chicxulub impact site and atmospheric/ocean circulations, e.g., [20]. Nowadays, reviews on the distribution of the K-Pg sites worldwide underline that terrestrial K-Pg sites are poorly represented, e.g., [16,[20][21][22][23][24][25]. Consequently, terrestrial ecosystem changes across the K-Pg transition are, as of today, not well resolved [24], in particular in South America, where the few sites displaying the K-Pg boundary diagnostic features are mainly from marine and transitional environments (e.g., Gorgonilla Island and the Paraibà Basin; [26][27][28]) (Figure 1A).…”

Section: Introductionmentioning

confidence: 99%

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

et al. 2023

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The Yacoraite Fm. (Salta rift basin, Argentina) consists of a mixed carbonate–siliciclastic lacustrine succession, interbedded with volcanic ash layers and organised in four third-order stratigraphic sequences. It is one of the few sites in South America that encompass the Cretaceous–Paleogene (K–Pg) transition, the position of which remains debated. Here, samples were collected along a depocentral stratigraphic section that was previously dated by zircon and carbonate U-Pb geochronology. The consistency between zircon and carbonate U-Pb ages, together with an accurate petrographic analysis, allowed the selection of carbonates potentially preserving the original geochemical signature. Accordingly, C-O stable isotopes were analysed from microbialites, oncoids, ooids and lacustrine cements. The available depositional age model from zircon geochronology defined the stratigraphic interval, potentially including the K–Pg transition. Within this interval, carbonates provided negative δ13C values consistent with the negative C anomaly recorded in various K–Pg sites elsewhere. Additionally, spherical particles resembling spherulites related to meteorite impacts were found in two samples. Accordingly, the K–Pg transition could be placed at the top of the second stratigraphic sequence. These findings encourage further investigation of the Yacoraite Fm. to gain insights into the response of South American terrestrial settings to the K–Pg palaeoenvironmental crisis.

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Chemostratigraphy Across the Cretaceous‐Paleogene (K‐Pg) Boundary

Cited by 8 publications

References 152 publications

An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

The End-Triassic Extinction as Recorded in the Deep-Sea Archive of the Budva Basin, Dinarides, Montenegro

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

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Chemostratigraphy Across the Cretaceous‐Paleogene (K‐Pg) Boundary

Cited by 8 publications

References 152 publications

An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

An overview of Rodinia-Gondwana Supercontinents, India - Asia Collision, emergence of Himalaya and Paleobiogeography of the eastern Tethys in Indian Subcontinent, South Asia

­The End-Triassic Extinction as Recorded in the Deep-Sea Archive of the Budva Basin, Dinarides, Montenegro

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

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The End-Triassic Extinction as Recorded in the Deep-Sea Archive of the Budva Basin, Dinarides, Montenegro