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Global and Planetary Change, 2015 16 pagesInternational audienceThe Geological Time Scale shows large uncertainties on durations and ages of Berriasian to Albian stages (Early Cretaceous), which impact climate and paleoceanographic reconstructions.
Mathieu Martinez +2 more
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Astrochronology of the Ediacaran Shuram carbon isotope excursion, Oman
Earth and Planetary Science Letters, 2020Abstract The Ediacaran is a highly dynamic period in terms of large perturbations in Earth's atmosphere, biosphere, and climate. Among these perturbations, a pronounced negative carbon isotope excursion, known as the Shuram excursion (SE), is characterized by the most depleted δ 13 C values (-12‰) that have ever been observed in the ...
Zheng Gong, Mingsong Li
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Seeing red in cyclic stratigraphy: Spectral noise estimation for astrochronology [PDF]
Paleoceanography, 2012 Fundamental to the development of astronomical time scales is the recognition of oscillatory variability within stratigraphic data and its evaluation relative to a null “noise” hypothesis. In this study, Monte Carlo simulations are used to investigate the suitability of two commonly used noise hypotheses (the “conventional” and “robust” AR1 approaches),
Stephen R Meyers
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Astrochronology for the Early Cretaceous Jehol Biota in northeastern China
Palaeogeography, Palaeoclimatology, Palaeoecology, 2013article i nfo The Early Cretaceous Jehol Biota in northeastern China provides an evolutionary window for 'feathered' dinosaurs, primitive birds, insects and early flowering plants. It also provides critical information for the bio- diversity changes of the Early Cretaceous terrestrial ecosystem.
Huaichun Wu +2 more
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Global and Planetary Change, 2020 Abstract The ages and durations of the stages in the Early Cretaceous commonly show discrepancies of several million years when the Geologic Time Scale (2020) from the International Commission of Stratigraphy (ICS) and recently published radio-astrochronologic data are compared.
Mathieu Martinez +2 more
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Astrochronology for the oldest Cambrian trilobites in Moroccan West Gondwana
2021<p>The lower Cambrian successions of Southern Morocco (West Gondwana) feature some of the oldest trilobites and archaeocyaths fossil remains in the world, as well as some of the largest carbon isotope excursions of the Phanerozoic. Combined with multiple state-of-the-art U-Pb radio-isotopic constraints, these sections are key references ...
Matthias Sinnesael +2 more
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Cyclostratigraphy and the problem of astrochronologic testing
Earth-Science Reviews, 2019Abstract When Milankovitch cycles are preserved in the geologic record they provide a direct link between chronometer and climate change, and thus a remarkable opportunity to constrain the evolution of the surficial Earth System. The identification of such cycles has allowed exploration of the geologic record with unprecedented temporal resolution ...
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Astrochronology of the Paleocene–Eocene Thermal Maximum on the East Tasman Plateau
Global and Planetary ChangeMingsong Li, Weiqi Yao, Zhijun Jin
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Earth-Science Reviews, 2010
Abstract A manual is presented to assist in assessing the suitability of individual calcareous rhythmites for high-resolution stratigraphic applications and orbital dating. While the astrochronological approach offers an unprecedented high temporal resolution for stratigraphy, caution is required to carefully choose suitable rhythmites for the ...
Westphal, H., Hilgen, F.J., Munnecke, A.
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Abstract A manual is presented to assist in assessing the suitability of individual calcareous rhythmites for high-resolution stratigraphic applications and orbital dating. While the astrochronological approach offers an unprecedented high temporal resolution for stratigraphy, caution is required to carefully choose suitable rhythmites for the ...
Westphal, H., Hilgen, F.J., Munnecke, A.
openaire +2 more sources