Cretaceous–Tertiary boundary problem on shallow carbonate platform: Carbon and oxygen excursions, biota and microfacies at the K/T boundary sections Dolenja Vas and Sopada in SW Slovenia, Adria CP

The transition of Maastrichtian to Danian in SW Slovenia was studied in two shallow marine carbonate successions. Apart from the extinction of some biota, the K/T boundary is reflected also in carbonate isotopic composition and in geochemistry. The K/T boundary is characterized by 20 cm to 1 m thick...

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Bibliographic Details
Published in:Palaeogeography, palaeoclimatology, palaeoecology palaeoclimatology, palaeoecology, 2007-11, Vol.255 (1), p.64-76
Main Authors: Ogorelec, Bojan, Dolenec, Tadej, Drobne, Katica
Format: Article
Language:English
Subjects:
Adria CP
Carbon and oxygen isotopes
K/T boundary
Microfacies
Shallow marine limestone
Slovenia
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Summary:The transition of Maastrichtian to Danian in SW Slovenia was studied in two shallow marine carbonate successions. Apart from the extinction of some biota, the K/T boundary is reflected also in carbonate isotopic composition and in geochemistry. The K/T boundary is characterized by 20 cm to 1 m thick sedimentary breccia of intertidal origin. Extreme depletion in the δ 13C content (up to − 8‰) was found in Dolenja Vas section just at this boundary. It related to global climatic changes caused by impact of extraterrestrial body followed by the destruction and combustion of terrestrial plants. Slight enrichment in δ 13C content (up to 2‰) is evident at Danian/Selandian boundary too.
ISSN:0031-0182
1872-616X
DOI:10.1016/j.palaeo.2007.02.041