Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia
The Oligocene diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka is described for the first time. The fossil flora contains a number of taxa of moderate to poor preservation and low abundance. Analysis of stratigraphic occurrence of diatoms throughout the section...
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Division of Biology, Faculty of Science, University of Zagreb
2009
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fthrcak:oai:hrcak.srce.hr:41423 2023-05-15T16:58:35+02:00 Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia Gladenkov, Andrey Yu.; Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow 119017, Russia; agladenkov@ilran.ru 2009-10-15 pdf http://hrcak.srce.hr/41423 http://hrcak.srce.hr/file/65017 en eng Division of Biology, Faculty of Science, University of Zagreb http://hrcak.srce.hr/41423 http://hrcak.srce.hr/file/65017 Full-text papers can be used for personal or educational purposes only. Authors' and publisher's copyrights must be acknowledged. Subscription details: Current issues and archive of Acta Botanica Croatica is entirely and freely availible online. The print version is available after subscription. Annual subscription for printed issues: Individuals, institutions and companies 300 Kn (40 EUR, 50 USD). Payment should be made after receipt of the invoice using bank transfer. Contact: acta@biol.pmf.hr Acta Botanica Croatica (acta@biol.pmf.hr); Vol.68 No.2 diatom biostratigraphy Paleogene Oligocene Pacific Kamchatka text 2009 fthrcak 2012-10-27T13:22:52Z The Oligocene diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka is described for the first time. The fossil flora contains a number of taxa of moderate to poor preservation and low abundance. Analysis of stratigraphic occurrence of diatoms throughout the section has been conducted. Two diatom assemblages of different ages are recognized in different parts of the 900 m-thick Alugivayam Formation. The younger assemblage is characterized by the presence of Cavitatus sp. cf. jouseanus and Odontella sawamurae. Co-occurrence of these taxamay indicate the age of enclosing sediment not older than ~31 Ma (the early Oligocene). The older assemblage from the basal part of the Alugivayam Formation lacks the mentioned taxa but contains Stephanopyxis species such as St. grunowii and St. marginata. Most likely, its age is at the earliest Oligocene. It is shown that in the studied Paleogene stratigraphic section diatoms appear just above the Eocene/Oligocene boundary. Data obtained on diatoms and diatom biomarkers may indicate increased diatom productivity in the sea basin after the Eocene/ Oligocene transition. The first data on diatom flora from stratigraphically well-controlled samples support the Oligocene age of the Alugivayam Formation in the Il’pinskii Peninsula section and contribute to regional correlations of theOligocene strata in Kamchatka. Text Kamchatka Hrčak - Portal of scientific journals of Croatia Pacific |
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Hrčak - Portal of scientific journals of Croatia |
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language |
English |
topic |
diatom biostratigraphy Paleogene Oligocene Pacific Kamchatka |
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diatom biostratigraphy Paleogene Oligocene Pacific Kamchatka Gladenkov, Andrey Yu.; Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow 119017, Russia; agladenkov@ilran.ru Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
topic_facet |
diatom biostratigraphy Paleogene Oligocene Pacific Kamchatka |
description |
The Oligocene diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka is described for the first time. The fossil flora contains a number of taxa of moderate to poor preservation and low abundance. Analysis of stratigraphic occurrence of diatoms throughout the section has been conducted. Two diatom assemblages of different ages are recognized in different parts of the 900 m-thick Alugivayam Formation. The younger assemblage is characterized by the presence of Cavitatus sp. cf. jouseanus and Odontella sawamurae. Co-occurrence of these taxamay indicate the age of enclosing sediment not older than ~31 Ma (the early Oligocene). The older assemblage from the basal part of the Alugivayam Formation lacks the mentioned taxa but contains Stephanopyxis species such as St. grunowii and St. marginata. Most likely, its age is at the earliest Oligocene. It is shown that in the studied Paleogene stratigraphic section diatoms appear just above the Eocene/Oligocene boundary. Data obtained on diatoms and diatom biomarkers may indicate increased diatom productivity in the sea basin after the Eocene/ Oligocene transition. The first data on diatom flora from stratigraphically well-controlled samples support the Oligocene age of the Alugivayam Formation in the Il’pinskii Peninsula section and contribute to regional correlations of theOligocene strata in Kamchatka. |
format |
Text |
author |
Gladenkov, Andrey Yu.; Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow 119017, Russia; agladenkov@ilran.ru |
author_facet |
Gladenkov, Andrey Yu.; Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow 119017, Russia; agladenkov@ilran.ru |
author_sort |
Gladenkov, Andrey Yu.; Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow 119017, Russia; agladenkov@ilran.ru |
title |
Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
title_short |
Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
title_full |
Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
title_fullStr |
Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
title_full_unstemmed |
Fossil diatom flora from the marine Paleogene stratigraphic key section of northeast Kamchatka, Russia |
title_sort |
fossil diatom flora from the marine paleogene stratigraphic key section of northeast kamchatka, russia |
publisher |
Division of Biology, Faculty of Science, University of Zagreb |
publishDate |
2009 |
url |
http://hrcak.srce.hr/41423 http://hrcak.srce.hr/file/65017 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Acta Botanica Croatica (acta@biol.pmf.hr); Vol.68 No.2 |
op_relation |
http://hrcak.srce.hr/41423 http://hrcak.srce.hr/file/65017 |
op_rights |
Full-text papers can be used for personal or educational purposes only. Authors' and publisher's copyrights must be acknowledged. Subscription details: Current issues and archive of Acta Botanica Croatica is entirely and freely availible online. The print version is available after subscription. Annual subscription for printed issues: Individuals, institutions and companies 300 Kn (40 EUR, 50 USD). Payment should be made after receipt of the invoice using bank transfer. Contact: acta@biol.pmf.hr |
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1766050637931347968 |