Stinging News: ‘Dickinsonia’ discovered in the Upper Vindhyan of India not worth the buzz

Meert, Joseph G.; Pandit, Manoj K.; Kwafo, Samuel; Singha, Ananya

doi:10.1016/j.gr.2023.01.003

Cited by 11 publications

(3 citation statements)

References 38 publications

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“…Within the cratonic part of the Indian Block, meanwhile, a possible Ediacaran fossil Arumberia banski is reported from the Jodhpur Group within the Marwar Basin (Kumar and Pandey, 2009). Most recently, a report of the late Ediacaran fossil Dickinsonia from the Mihar Sandstone of Vindhyan Basin (Retallack et al, 2021) turned out to be fallacious (Meert et al, 2023).…”

Section: Cryogenian and Ediacaran Biotas In The Qinghai-tibetan Plate...mentioning

confidence: 99%

Cryogenian and Ediacaran integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Sun,

Khan,

Yang

et al. 2024

Sci. China Earth Sci.

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Section: Cryogenian and Ediacaran Biotas In The Qinghai-tibetan Plate...mentioning

confidence: 99%

Cryogenian and Ediacaran integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Sun,

Khan,

Yang

et al. 2024

Sci. China Earth Sci.

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“…and Charniodiscus-like Ediacaran megafossil have been reported and discussed from the Maihar Sandstone and considered to be deposited within the late Ediacaran Period (Kumar & Pandey, 2008, Pandey, 2012Retallack et al 2021;Pandey et al 2023b). However, Dickinsonia tenuis has been challenged by Pandey et al (2023a) and Meert et al (2023) and proven to be a pseudofossil.…”

Section: Primary Productivity In An Ediacaran Basinmentioning

confidence: 99%

High primary productivity in an Ediacaran shallow marine basin influenced by strong seasonal to perennial upwelling

Ansari,

Pandey,

Ahmad

et al. 2023

Geol. Mag.

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A significant area of late Neoproterozoic–early Cambrian seafloor hosted a ferruginous to euxinic condition as a result of expanded primary productivity-driven pumping of organic matter into subsurface water column and weak water column mixing in the concomitant sea. However, the cause and extent of increased marine primary productivity during this time interval remain unknown. To estimate the primary productivity in a late Neoproterozoic sea, this study investigated the Sirbu Shale, Vindhyan Supergroup, for trace elements, organic carbon isotopes and total organic carbon (TOC). Among the trace elements, cadmium (Cd), known for extremely low concentration in crustal rocks but higher abundance in biogenic organic matter, was the key parameter in the palaeoproductivity estimation. The Cd enrichment in the Sirbu Shale samples is comparable to that in modern marine sediments of the oxygen minimum zones in Chilean margins, Arabian Sea and Gulf of California characterized by high primary productivity and seasonal upwelling. In terms of Cd enrichment, the lower section of the Sirbu Shale was deposited under suboxic conditions, while the upper section was deposited under a relatively less reducing condition. Cd/Mo ratios > 0.36 in the shale sample indicate that the palaeoproductivity was strongly influenced by the nutrient supply through sea-shelf upwelling. Using non-detrital enrichment of Cd in Sirbu Shale samples, we calculated that the TOC exported to the floor of Sirbu Shale palaeodepositional setting through primary productivity ranged from 0.71 to 10.16%.

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“…The recent mistaken identification of the Ediacaran fossil 'Dickinsonia' from the Upper Bhander Sandstone at Bhimbetka near Bhopal, Madhya Pradesh (M.P.) by Retallack et al (2021) and its recognition later as extant beehive impressions (Meert et al, 2023) together with the occurrence of a single youngest ~548 Ma zircon grain from the Maihar Sandstone at Maihar (M.P.) (Lan et al, 2020) has raised interest on the re-assessment of the closure age of the Vindhyan basin.…”

Section: Introductionmentioning

confidence: 99%

Detrital zircon U-Pb ages of Proterozoic and Cretaceous sandstones of Narmada region in Central India: Implications for provenance and the closure age of the Vindhyan Basin

Kumari¹,

Tandon²,

Kallukalam³

et al. 2023

Preprint

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This study presents detrital zircon U-Pb ages of the Upper Bhander Sandstones from the Bhopal inlier, and the overlying Cretaceous sandstones from Jabalpur, Central India. These data are combined with existing palaeobiological evidence to address the issue of lack of convergence between geochronology and biochronology of the Upper Vindhyan succession in central India. The age-spectra of Upper Bhander Sandstone show the dominance of detrital zircon population between 1500-1900 Ma, a subordinate cluster of 2400-2600 Ma, and a single youngest zircon grain of ~770 Ma. These detrital zircon ages correlate with the timing of granite magmatism in Bundelkhand, Aravalli and Central Indian Tectonic Zone (CITZ), implying their derivation from these terranes. The finding of a single zircon of 770 + 12 Ma, supports the premise that Vindhyan deposition extended in to the late Tonian. Cretaceous sandstones of the Jabalpur and Lameta Formations contain zircon grains of ~550 Ma and ~700-800 Ma age. Except for the evidence from this youngest Vindhyan sedimentary sequence, no rocks of Late Neoproterozoic-Early Cambrian age have so far been reported from Central India, which can be correlated with these zircon ages. Comparable age-spectra of the Upper Bhander and the Cretaceous sandstones indicates that the proximal Vindhyan sandstones could have supplied detritus to these younger sandstones. These Cretaceous sandstones also constitute a window to understand the geology of the pre-Cretaceous eroded terrain, and support the premise that the Vindhyan sedimentation did not terminate at 1000 Ma.

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Stinging News: ‘Dickinsonia’ discovered in the Upper Vindhyan of India not worth the buzz

Cited by 11 publications

References 38 publications

Cryogenian and Ediacaran integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

Cryogenian and Ediacaran integrative stratigraphy, biotas, and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

High primary productivity in an Ediacaran shallow marine basin influenced by strong seasonal to perennial upwelling

Detrital zircon U-Pb ages of Proterozoic and Cretaceous sandstones of Narmada region in Central India: Implications for provenance and the closure age of the Vindhyan Basin

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