Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia
The distribution of conodonts in the Lower–Middle Ordovician beds was studied in five drill core sections of southeastern Estonia. Ten conodont zones and six subzones, from the Paroistodus proteus Zone to the Eoplacognathus lindstroemi Subzone, were established. The peculiarity of the studied seque...
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| Format: | Article |
| Language: | English |
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Estonian Academy Publishers
2011-03-01
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| Series: | Estonian Journal of Earth Sciences |
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| Online Access: | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2011/issue_1/earth-2011-1-1-21.pdf |
| _version_ | 1819048492126961664 |
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| author | Viive Viira |
| author_facet | Viive Viira |
| author_sort | Viive Viira |
| collection | DOAJ |
| description | The distribution of conodonts in the Lower–Middle Ordovician beds was studied in five drill core sections of southeastern Estonia. Ten conodont zones and six subzones, from the Paroistodus proteus Zone to the Eoplacognathus lindstroemi Subzone, were established. The peculiarity of the studied sequence is that the Volkhov Stage is notably poor in conodonts, in particular Baltoniodus species. Large specimens of Drepanodus arcuatus and Protopanderodus rectus, however, are found in great numbers in the uppermost Volkhov and lower Kunda stages. The deeper shelf conodont faunas recognized in SE Estonia (Central Baltoscandian confacies belt) are compared with shallow shelf faunas of northern Estonia (North Estonian confacies belt). |
| first_indexed | 2024-12-21T11:17:07Z |
| format | Article |
| id | doaj.art-ade42e3b7d4140c2829d06a07a2ff63f |
| institution | Directory Open Access Journal |
| issn | 1736-4728 |
| language | English |
| last_indexed | 2024-12-21T11:17:07Z |
| publishDate | 2011-03-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-ade42e3b7d4140c2829d06a07a2ff63f2022-12-21T19:05:53ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47282011-03-0160112110.3176/earth.2011.1.01Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent RussiaViive ViiraThe distribution of conodonts in the Lower–Middle Ordovician beds was studied in five drill core sections of southeastern Estonia. Ten conodont zones and six subzones, from the Paroistodus proteus Zone to the Eoplacognathus lindstroemi Subzone, were established. The peculiarity of the studied sequence is that the Volkhov Stage is notably poor in conodonts, in particular Baltoniodus species. Large specimens of Drepanodus arcuatus and Protopanderodus rectus, however, are found in great numbers in the uppermost Volkhov and lower Kunda stages. The deeper shelf conodont faunas recognized in SE Estonia (Central Baltoscandian confacies belt) are compared with shallow shelf faunas of northern Estonia (North Estonian confacies belt).http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2011/issue_1/earth-2011-1-1-21.pdfconodontsbiostratigraphyLower OrdovicianMiddle OrdovicianEstonia. |
| spellingShingle | Viive Viira Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia Estonian Journal of Earth Sciences conodonts biostratigraphy Lower Ordovician Middle Ordovician Estonia. |
| title | Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia |
| title_full | Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia |
| title_fullStr | Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia |
| title_full_unstemmed | Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia |
| title_short | Lower and Middle Ordovician conodonts from the subsurface of SE Estonia and adjacent Russia |
| title_sort | lower and middle ordovician conodonts from the subsurface of se estonia and adjacent russia |
| topic | conodonts biostratigraphy Lower Ordovician Middle Ordovician Estonia. |
| url | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2011/issue_1/earth-2011-1-1-21.pdf |
| work_keys_str_mv | AT viiveviira lowerandmiddleordovicianconodontsfromthesubsurfaceofseestoniaandadjacentrussia |