Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia
The transition from the Bartonian to the Priabonian, as traditionally understood, has long been associated with a series of extinctions and originations in several microfossil groups. The planktonic forami- nifer genus Morozovelloides and large species of Acarinina suffered a rapid global extinction...
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ftunivmodena:oai:iris.unimore.it:11380/1111139 2024-04-14T08:18:32+00:00 Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wouts Less, Gyorgy Monechi, Simonetta PAPAZZONI, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wout Less, Gyorgy Monechi, Simonetta Papazzoni, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. 2017 STAMPA http://hdl.handle.net/11380/1111139 https://doi.org/10.1127/nos/2016/0313 http://www.ingentaconnect.com/content/schweiz/nis/pre-prints/content-nos_00_0_0000_0000_cotton_0313_prepub eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000404423900004 volume:50 issue:3 firstpage:1 lastpage:27 numberofpages:27 journal:NEWSLETTERS ON STRATIGRAPHY http://hdl.handle.net/11380/1111139 doi:10.1127/nos/2016/0313 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019868215 http://www.ingentaconnect.com/content/schweiz/nis/pre-prints/content-nos_00_0_0000_0000_cotton_0313_prepub info:eu-repo/semantics/openAccess biostratigraphy Priabonian foraminifera nannofossil Armenia info:eu-repo/semantics/article 2017 ftunivmodena https://doi.org/10.1127/nos/2016/0313 2024-03-21T18:07:40Z The transition from the Bartonian to the Priabonian, as traditionally understood, has long been associated with a series of extinctions and originations in several microfossil groups. The planktonic forami- nifer genus Morozovelloides and large species of Acarinina suffered a rapid global extinction, as did many radiolarians. Calcareous nannofossils show several assemblage changes including the acme beginning of Cri- brocentrum erbae and the lowest and highest occurrences of Chiasmolithus oamaruensis and C. grandis re- spectively. In shallow water environments, larger foraminifera also show an extinction among large species of Nummulites, as well as the first occurrences of the stratigraphically important genus Spiroclypeus. Howe- ver, the correlation between shallow and deep water records remains uncertain, as do the mechanisms driving these biotic events. Here we present the results of a new integrated stratigraphical study (calcareous nanno- fossils, planktonic foraminifera, larger benthic foraminifera, and low-resolution magnetostratigraphy) of the Urtsadzor section in south-western Armenia which appears to be continuous through this interval. The Urt- sadzor section consists of calcareous siltstones rich in micro- and nannofossils, with interbedded limestones containing abundant larger benthic foraminifera. Our new data enable us to correlate larger foraminiferal events with global plankton biostratigraphy, in a section outside of southwest Europe where most previous correlations have been based. At Urtsadzor, the large Nummulites species of N. millecaput-group are present throughout the whole section but decrease in abundance toward the top. The first occurrence of Spiroclypeus, also occurs in the upper part of the section, marking the SBZ 18/19 boundary. These events are associated with the phylogenetic development of the Nummulites fabianii and Heterostegina reticulata lineages. Howe- ver, the calcareous plankton biostratigraphy indicates the section is well within the Priabonian; within plank-tonic ... Article in Journal/Newspaper Planktonic foraminifera Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) Newsletters on Stratigraphy 50 3 269 295 |
institution |
Open Polar |
collection |
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS) |
op_collection_id |
ftunivmodena |
language |
English |
topic |
biostratigraphy Priabonian foraminifera nannofossil Armenia |
spellingShingle |
biostratigraphy Priabonian foraminifera nannofossil Armenia Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wouts Less, Gyorgy Monechi, Simonetta PAPAZZONI, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
topic_facet |
biostratigraphy Priabonian foraminifera nannofossil Armenia |
description |
The transition from the Bartonian to the Priabonian, as traditionally understood, has long been associated with a series of extinctions and originations in several microfossil groups. The planktonic forami- nifer genus Morozovelloides and large species of Acarinina suffered a rapid global extinction, as did many radiolarians. Calcareous nannofossils show several assemblage changes including the acme beginning of Cri- brocentrum erbae and the lowest and highest occurrences of Chiasmolithus oamaruensis and C. grandis re- spectively. In shallow water environments, larger foraminifera also show an extinction among large species of Nummulites, as well as the first occurrences of the stratigraphically important genus Spiroclypeus. Howe- ver, the correlation between shallow and deep water records remains uncertain, as do the mechanisms driving these biotic events. Here we present the results of a new integrated stratigraphical study (calcareous nanno- fossils, planktonic foraminifera, larger benthic foraminifera, and low-resolution magnetostratigraphy) of the Urtsadzor section in south-western Armenia which appears to be continuous through this interval. The Urt- sadzor section consists of calcareous siltstones rich in micro- and nannofossils, with interbedded limestones containing abundant larger benthic foraminifera. Our new data enable us to correlate larger foraminiferal events with global plankton biostratigraphy, in a section outside of southwest Europe where most previous correlations have been based. At Urtsadzor, the large Nummulites species of N. millecaput-group are present throughout the whole section but decrease in abundance toward the top. The first occurrence of Spiroclypeus, also occurs in the upper part of the section, marking the SBZ 18/19 boundary. These events are associated with the phylogenetic development of the Nummulites fabianii and Heterostegina reticulata lineages. Howe- ver, the calcareous plankton biostratigraphy indicates the section is well within the Priabonian; within plank-tonic ... |
author2 |
Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wout Less, Gyorgy Monechi, Simonetta Papazzoni, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. |
format |
Article in Journal/Newspaper |
author |
Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wouts Less, Gyorgy Monechi, Simonetta PAPAZZONI, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. |
author_facet |
Cotton, Laura Zakrevskaya, Elena Y. Boon, Annique van der Asatryan, Gayane Hayrapetyan, Flora Israelyan, Arsen Krijgsman, Wouts Less, Gyorgy Monechi, Simonetta PAPAZZONI, Cesare Andrea Pearson, Paul N. Razumovskiy, Anatoli Renema, Willem Shcherbinina, Ekaterina Wade, Bridget S. |
author_sort |
Cotton, Laura |
title |
Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
title_short |
Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
title_full |
Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
title_fullStr |
Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
title_full_unstemmed |
Integrated stratigraphy of the Priabonian (upper Eocene) Urtsadzor section, Armenia |
title_sort |
integrated stratigraphy of the priabonian (upper eocene) urtsadzor section, armenia |
publishDate |
2017 |
url |
http://hdl.handle.net/11380/1111139 https://doi.org/10.1127/nos/2016/0313 http://www.ingentaconnect.com/content/schweiz/nis/pre-prints/content-nos_00_0_0000_0000_cotton_0313_prepub |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000404423900004 volume:50 issue:3 firstpage:1 lastpage:27 numberofpages:27 journal:NEWSLETTERS ON STRATIGRAPHY http://hdl.handle.net/11380/1111139 doi:10.1127/nos/2016/0313 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019868215 http://www.ingentaconnect.com/content/schweiz/nis/pre-prints/content-nos_00_0_0000_0000_cotton_0313_prepub |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1127/nos/2016/0313 |
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