Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France
The calcareous nannoplankton floras of sections in Tunisia, Southern Spain and France have been investigated leading to a succession of 17 biozones for the Middle and Upper Cretaceous, of which the Rucinolithus hayii Zone for the Middle Santonian is new. In order to correlate the zonation with the c...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/205827 2023-07-23T04:21:27+02:00 Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France Verbeek, J.W. 1977 image/pdf https://dspace.library.uu.nl/handle/1874/205827 en eng 0083-4963 https://dspace.library.uu.nl/handle/1874/205827 info:eu-repo/semantics/OpenAccess Earth Sciences Dissertation 1977 ftunivutrecht 2023-07-01T23:50:54Z The calcareous nannoplankton floras of sections in Tunisia, Southern Spain and France have been investigated leading to a succession of 17 biozones for the Middle and Upper Cretaceous, of which the Rucinolithus hayii Zone for the Middle Santonian is new. In order to correlate the zonation with the chronostratigraphic scale the calcareous nannofossil contents of the stratotypes of the commonly used European Middle and Upper Cretaceous stages have been investigated. The nannofloras of the Cenomanian and Turonian Stages have been published in earlier papers and the stratotype of the Coniacian Stage contains no calcareous nannofossils. From the samples used for the present study the planktonic foraminifera have also been studied to obtain a first order correlation between the zonations based on calcareous nannoplankton and planktonic foraminifera. Evolutionary trends have been recognized and are described in detail in the genera Ceratolithoides, Eiffellithus and Broinsonia. For the description of the calcareous nannofossils the generally accepted terminology is used, completed with some new terms. Remarks have been made on the observed taxa and several new combinations are proposed. Doctoral or Postdoctoral Thesis Planktonic foraminifera Utrecht University Repository |
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Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Verbeek, J.W. Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
topic_facet |
Earth Sciences |
description |
The calcareous nannoplankton floras of sections in Tunisia, Southern Spain and France have been investigated leading to a succession of 17 biozones for the Middle and Upper Cretaceous, of which the Rucinolithus hayii Zone for the Middle Santonian is new. In order to correlate the zonation with the chronostratigraphic scale the calcareous nannofossil contents of the stratotypes of the commonly used European Middle and Upper Cretaceous stages have been investigated. The nannofloras of the Cenomanian and Turonian Stages have been published in earlier papers and the stratotype of the Coniacian Stage contains no calcareous nannofossils. From the samples used for the present study the planktonic foraminifera have also been studied to obtain a first order correlation between the zonations based on calcareous nannoplankton and planktonic foraminifera. Evolutionary trends have been recognized and are described in detail in the genera Ceratolithoides, Eiffellithus and Broinsonia. For the description of the calcareous nannofossils the generally accepted terminology is used, completed with some new terms. Remarks have been made on the observed taxa and several new combinations are proposed. |
format |
Doctoral or Postdoctoral Thesis |
author |
Verbeek, J.W. |
author_facet |
Verbeek, J.W. |
author_sort |
Verbeek, J.W. |
title |
Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
title_short |
Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
title_full |
Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
title_fullStr |
Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
title_full_unstemmed |
Calcareous nannoplankton biostratigraphy of Middle and Upper Cretaceous deposits in Tunisia, Southern Spain and France |
title_sort |
calcareous nannoplankton biostratigraphy of middle and upper cretaceous deposits in tunisia, southern spain and france |
publishDate |
1977 |
url |
https://dspace.library.uu.nl/handle/1874/205827 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
0083-4963 https://dspace.library.uu.nl/handle/1874/205827 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772187024845963264 |