DC pole | Wartość | Język |
dc.contributor.author | Bond, Dave | - |
dc.contributor.author | Zatoń, Michał | - |
dc.date.accessioned | 2019-08-01T07:03:51Z | - |
dc.date.available | 2019-08-01T07:03:51Z | - |
dc.date.issued | 2003 | - |
dc.identifier.citation | Acta Geologica Polonica, 2003, vol 53, No. 2, s. 93-99 | pl_PL |
dc.identifier.issn | 0001-5709 | - |
dc.identifier.issn | 2300-1887 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/10393 | - |
dc.description.abstract | The Upper Devonian sequence at Kowala in the Holy Cross Mountains was logged using gamma-ray spectrometry,
for investigating the changes of oxygenation level in the Late Devonian basin. The Th/U ratio indicates that oxygen
levels were low throughout the Late Frasnian interval, with low peaks during the Kellwasser Events showing anoxic
conditions in the basin. The F-F boundary interval was also oxygen deficient, but there may have been a brief reoxygenation
at the boundary itself. By the Famennian crepida Zone, the basin gradually began to reoxygenate, but in the
trachytera Zone another anoxic event, the Annulata Event occurred, causing a bloom rather than extinction of specially
adapted taxa such as Guerichia. Thus the gamma-ray spectrometry data suggests that basinal anoxia prevailed
through much of the Late Frasnian. The F-F extinction might have been the result of prolonged stresses imposed on
the ecosystem, particularly during the euxinic Upper Kellwasser Event. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/pl/ | * |
dc.subject | Devonian | pl_PL |
dc.subject | Kellwasser Event | pl_PL |
dc.subject | Annulata Event | pl_PL |
dc.subject | Frasnian-Famennian boundary | pl_PL |
dc.subject | Holy Cross Mountains | pl_PL |
dc.subject | Gamma-ray spectrometry | pl_PL |
dc.title | Gamma-ray spectrometry across the Upper Devonian basin succession at Kowala in the Holy Cross Mountains (Poland) | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
Pojawia się w kolekcji: | Artykuły (WNP)
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