Global Climates of the Vendian: Geological Evidence
Methodological problems and the approach proposed Using paleoclimatic reconstruction methods developed for the Phanerozoic (Semikhatov, Chumakov, 2004) in the Vendian is hampered by four circumstances. The main difficulty arises because of the low resolution of Vendian chronostratigraphy when compar...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.515.8583 2023-05-15T18:43:52+02:00 Global Climates of the Vendian: Geological Evidence N. M. Chumakov The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.515.8583 http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.515.8583 http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf text ftciteseerx 2016-01-08T09:52:24Z Methodological problems and the approach proposed Using paleoclimatic reconstruction methods developed for the Phanerozoic (Semikhatov, Chumakov, 2004) in the Vendian is hampered by four circumstances. The main difficulty arises because of the low resolution of Vendian chronostratigraphy when compared with that of the Phanerozoic. For the Vendian, interregional and especially global stratigraphic correlations can be made only to an accuracy not exceeding tens of millions of years. In two to three of the best studied sequences, the Vendian has been divided into five widely correlative units on the basis of ichno- and microfossil complexes, Ediacaran metazoan faunas, radiometric dates and stable isotope signatures, and glacial horizons (Knoll, 2000; Walter, et al., 2000). Six stratigraphic levels have been identified in White Sea sequences of the Middle Vendian based on metazoan faunal assemblages (Fedonkin, 2003). In the great majority of other Vendian sequences, the set of stratigraphic data is insufficient to subdivide and especially to globally correlate regional units. On a global scale, only three units in Vendian sequences appear to be currently distinguishable and correlatable. The remaining stratigraphic horizons noted in the Vendian System are regional. At best, interregional Text White Sea Unknown White Sea |
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Methodological problems and the approach proposed Using paleoclimatic reconstruction methods developed for the Phanerozoic (Semikhatov, Chumakov, 2004) in the Vendian is hampered by four circumstances. The main difficulty arises because of the low resolution of Vendian chronostratigraphy when compared with that of the Phanerozoic. For the Vendian, interregional and especially global stratigraphic correlations can be made only to an accuracy not exceeding tens of millions of years. In two to three of the best studied sequences, the Vendian has been divided into five widely correlative units on the basis of ichno- and microfossil complexes, Ediacaran metazoan faunas, radiometric dates and stable isotope signatures, and glacial horizons (Knoll, 2000; Walter, et al., 2000). Six stratigraphic levels have been identified in White Sea sequences of the Middle Vendian based on metazoan faunal assemblages (Fedonkin, 2003). In the great majority of other Vendian sequences, the set of stratigraphic data is insufficient to subdivide and especially to globally correlate regional units. On a global scale, only three units in Vendian sequences appear to be currently distinguishable and correlatable. The remaining stratigraphic horizons noted in the Vendian System are regional. At best, interregional |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
author |
N. M. Chumakov |
spellingShingle |
N. M. Chumakov Global Climates of the Vendian: Geological Evidence |
author_facet |
N. M. Chumakov |
author_sort |
N. M. Chumakov |
title |
Global Climates of the Vendian: Geological Evidence |
title_short |
Global Climates of the Vendian: Geological Evidence |
title_full |
Global Climates of the Vendian: Geological Evidence |
title_fullStr |
Global Climates of the Vendian: Geological Evidence |
title_full_unstemmed |
Global Climates of the Vendian: Geological Evidence |
title_sort |
global climates of the vendian: geological evidence |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.515.8583 http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf |
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http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.515.8583 http://monash.edu/science/about/schools/geosciences/precsite/docs/workshop/prato04/abstracts/chumakov.pdf |
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