Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)

The 6th Kilian Group meeting of the IUGS Lower Cretaceous Ammonite Working Group (the Kilian Group) was held in Vienna, Austria, 20th August 2017. The Group mainly discussed the standard zonation that is suitable for and based mainly on ammonite data of the Mediterranean Province of the Mediterranea...

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Autores principales: Reboulet, S., Szives, O., Aguirre-Urreta, B., Barragán, R., Company, M., Frau, C., Kakabadze, M.V., Klein, J., Moreno-Bedmar, J.A., Lukeneder, A., Pictet, A., Ploch, I., Raisossadat, S.N., Vašíček, Z., Baraboshkin, E.J., Mitta, V.V.
Formato: JOUR
Materias:
Ammonites
Barremian
Berriasian
Mediterranean Province
Standard zonation
Valanginian
ammonite
biostratigraphy
biozonation
conference proceeding
Cretaceous
Austria
Vienna
Ammonoidea
Fallax
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01956671_v91_n_p100_Reboulet
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01956671_v91_n_p100_Reboulet2023-10-03T15:09:38Z Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017) Reboulet, S. Szives, O. Aguirre-Urreta, B. Barragán, R. Company, M. Frau, C. Kakabadze, M.V. Klein, J. Moreno-Bedmar, J.A. Lukeneder, A. Pictet, A. Ploch, I. Raisossadat, S.N. Vašíček, Z. Baraboshkin, E.J. Mitta, V.V. Ammonites Barremian Berriasian Mediterranean Province Standard zonation Valanginian ammonite Barremian Berriasian biostratigraphy biozonation conference proceeding Cretaceous Austria Vienna Ammonoidea Fallax The 6th Kilian Group meeting of the IUGS Lower Cretaceous Ammonite Working Group (the Kilian Group) was held in Vienna, Austria, 20th August 2017. The Group mainly discussed the standard zonation that is suitable for and based mainly on ammonite data of the Mediterranean Province of the Mediterranean–Caucasian Subrealm (Tethyan Realm). Some changes have been made on three stages. The uppermost part of the Berriasian is now characterised by the Tirnovella alpillensis Zone, that is subdivided into a lower T. alpillensis Subzone and an upper “Thurmanniceras” otopeta Subzone; the T. alpillensis (Sub-)Zone is here defined by the first appearance datum (FAD) of the index-species. For the Valanginian, the Neocomites premolicus Subzone is introduced in the lower part of the “Thurmanniceras” pertransiens Zone. The FAD of N. premolicus occurs at the base of the “T.” pertransiens Zone. So this subzone starts at the base of the “T.” pertransiens Zone and provisionally ends at the last occurrence of N. premolicus as the upper part of the zone is not characterised by a subzone for the moment. For the Barremian, the former Holcodiscus fallax, Nicklesia didayana, Heinzia communis, Subtorcapella defayae, Coronites darsi, Heinzia caicedi and Anglesites puzosianum horizons have been abandoned. In agreement with systematic positions, the term “auctorum” is deleted for Taveraidiscus hugii, the index-species of the first zone of this stage. The Kotetishvilia compressissima Zone is subdivided into a lower Holcodiscus fallax Subzone and an upper Holcodiscus caillaudianus Subzone. The Barrancyloceras barremense Subzone (upper subzone of the Toxancyloceras vandenheckii Zone) is replaced by the Gassendiceras alpinum Subzone. The Imerites giraudi Zone is kept but its base should be now defined by the FAD of I. dichotomus, which marks the inception of the genus Imerites. For certain stratigraphic intervals the Group discussed and in some cases strengthened the previous correlations between the standard Mediterranean zonation with the different ammonite zonal schemes of other provinces and realms. Some members of the Group presented the possibility of using regional stages as secondary standards, in accordance with the recommendations of the International Commission on Stratigraphy. The report concludes with an appreciation of the French ammonitologist Jean-Pierre Thieuloy deceased in 2017, the nomination of a vice-chair, membership, future work and next meeting of the Kilian Group. © 2018 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01956671_v91_n_p100_Reboulet
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ammonites
Barremian
Berriasian
Mediterranean Province
Standard zonation
Valanginian
ammonite
Barremian
Berriasian
biostratigraphy
biozonation
conference proceeding
Cretaceous
Austria
Vienna
Ammonoidea
Fallax
spellingShingle Ammonites
Barremian
Berriasian
Mediterranean Province
Standard zonation
Valanginian
ammonite
Barremian
Berriasian
biostratigraphy
biozonation
conference proceeding
Cretaceous
Austria
Vienna
Ammonoidea
Fallax
Reboulet, S.
Szives, O.
Aguirre-Urreta, B.
Barragán, R.
Company, M.
Frau, C.
Kakabadze, M.V.
Klein, J.
Moreno-Bedmar, J.A.
Lukeneder, A.
Pictet, A.
Ploch, I.
Raisossadat, S.N.
Vašíček, Z.
Baraboshkin, E.J.
Mitta, V.V.
Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
topic_facet Ammonites
Barremian
Berriasian
Mediterranean Province
Standard zonation
Valanginian
ammonite
Barremian
Berriasian
biostratigraphy
biozonation
conference proceeding
Cretaceous
Austria
Vienna
Ammonoidea
Fallax
description The 6th Kilian Group meeting of the IUGS Lower Cretaceous Ammonite Working Group (the Kilian Group) was held in Vienna, Austria, 20th August 2017. The Group mainly discussed the standard zonation that is suitable for and based mainly on ammonite data of the Mediterranean Province of the Mediterranean–Caucasian Subrealm (Tethyan Realm). Some changes have been made on three stages. The uppermost part of the Berriasian is now characterised by the Tirnovella alpillensis Zone, that is subdivided into a lower T. alpillensis Subzone and an upper “Thurmanniceras” otopeta Subzone; the T. alpillensis (Sub-)Zone is here defined by the first appearance datum (FAD) of the index-species. For the Valanginian, the Neocomites premolicus Subzone is introduced in the lower part of the “Thurmanniceras” pertransiens Zone. The FAD of N. premolicus occurs at the base of the “T.” pertransiens Zone. So this subzone starts at the base of the “T.” pertransiens Zone and provisionally ends at the last occurrence of N. premolicus as the upper part of the zone is not characterised by a subzone for the moment. For the Barremian, the former Holcodiscus fallax, Nicklesia didayana, Heinzia communis, Subtorcapella defayae, Coronites darsi, Heinzia caicedi and Anglesites puzosianum horizons have been abandoned. In agreement with systematic positions, the term “auctorum” is deleted for Taveraidiscus hugii, the index-species of the first zone of this stage. The Kotetishvilia compressissima Zone is subdivided into a lower Holcodiscus fallax Subzone and an upper Holcodiscus caillaudianus Subzone. The Barrancyloceras barremense Subzone (upper subzone of the Toxancyloceras vandenheckii Zone) is replaced by the Gassendiceras alpinum Subzone. The Imerites giraudi Zone is kept but its base should be now defined by the FAD of I. dichotomus, which marks the inception of the genus Imerites. For certain stratigraphic intervals the Group discussed and in some cases strengthened the previous correlations between the standard Mediterranean zonation with the different ammonite zonal schemes of other provinces and realms. Some members of the Group presented the possibility of using regional stages as secondary standards, in accordance with the recommendations of the International Commission on Stratigraphy. The report concludes with an appreciation of the French ammonitologist Jean-Pierre Thieuloy deceased in 2017, the nomination of a vice-chair, membership, future work and next meeting of the Kilian Group. © 2018 Elsevier Ltd
format JOUR
author Reboulet, S.
Szives, O.
Aguirre-Urreta, B.
Barragán, R.
Company, M.
Frau, C.
Kakabadze, M.V.
Klein, J.
Moreno-Bedmar, J.A.
Lukeneder, A.
Pictet, A.
Ploch, I.
Raisossadat, S.N.
Vašíček, Z.
Baraboshkin, E.J.
Mitta, V.V.
author_facet Reboulet, S.
Szives, O.
Aguirre-Urreta, B.
Barragán, R.
Company, M.
Frau, C.
Kakabadze, M.V.
Klein, J.
Moreno-Bedmar, J.A.
Lukeneder, A.
Pictet, A.
Ploch, I.
Raisossadat, S.N.
Vašíček, Z.
Baraboshkin, E.J.
Mitta, V.V.
author_sort Reboulet, S.
title Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
title_short Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
title_full Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
title_fullStr Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
title_full_unstemmed Report on the 6th International Meeting of the IUGS Lower Cretaceous Ammonite Working Group, the Kilian Group (Vienna, Austria, 20th August 2017)
title_sort report on the 6th international meeting of the iugs lower cretaceous ammonite working group, the kilian group (vienna, austria, 20th august 2017)
url http://hdl.handle.net/20.500.12110/paper_01956671_v91_n_p100_Reboulet
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