THE FRASNIAN-FAMENNIAN BOUNDARY IN THE SOUTHERN URALS
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dc.contributor.author | Abramova A.N. | |
dc.contributor.author | Artyushkova O.V. | |
dc.date.accessioned | 2022-09-28T05:54:11Z | |
dc.date.available | 2022-09-28T05:54:11Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=13458662 | |
dc.identifier.citation | Geological Quarterly, 2004, 48, 3, 217-232 | |
dc.identifier.issn | 1641-7291 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38785 | |
dc.description.abstract | On the western slope of the Southern Urals, a continuous conodont zone sequence within different facies of the Frasnian-Famennian (F-F) boundary beds is documented. In all the sections the boundary between both stages runs within lithologically uniform successions and can be determined only by a sharp faunal change. In brachiopod facies, it is placed within brachiopod shell beds and relates to the base of the Barma Beds, i.e., the level marked by a simultaneous appearance of the index brachiopod species Pugnoides(?) markovskii and the zonal conodont species Palmatolepis triangularis. In goniatite facies, the F-F boundary can be traced by the disappearance of diverse Frasnian conodonts and goniatites of the genus Manticoceras, coupled with the first occurrence of the conodont Pa. triangularis; the sequence shows also the well-known icriodid blooms in the earliest Famennian. Finds of Famennian goniatites (representatives of the genus Cheiloceras) are confined to the crepida zones. In the sections of the West-Zilair, where the F-F boundary passage consists of siliceous-terrigenous deposits, the boundary can be established only by a change in conodont assemblages. In all the sections under investigation the F-F boundary level shows a drastic faunal change that corresponds to the global Kellwasser Event. | |
dc.subject | Famennian | |
dc.subject | Frasnian | |
dc.title | THE FRASNIAN-FAMENNIAN BOUNDARY IN THE SOUTHERN URALS | |
dc.type | Статья | |
dc.subject.age | Paleozoic::Devonian::Upper::Famennian | |
dc.subject.age | Paleozoic::Devonian::Upper::Frasnian | |
dc.subject.age | Палеозой::Девонская::Верхний::Фаменский | ru |
dc.subject.age | Палеозой::Девонская::Верхний::Франский | ru |
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