The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia
Multi-proxy correlation is used to address the boundary of the Kukruse and Haljala regional stages across the Estonian part of the Baltoscandian Ordovician Palaeobasin. New biostratigraphic information on conodonts, chitinozoans and ostracods from the Peetri outcrop, northwestern Estonia, integrated...
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Estonian Academy Publishers
2020-04-01
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Series: | Estonian Journal of Earth Sciences |
Online Access: | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2020/issue_2/earth-2020-2-76-90.pdf |
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doaj-c2ae65700c5041dd82821d3a33935aef2020-11-25T03:32:04ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572020-04-01692769010.3176/earth.2020.0510.3176/earth.2020.05The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in EstoniaTõnn Paiste0Peep Männik1Jaak Nõlvak2Tõnu Meidla3Institute of Geology, University of Tartu, Ravila 14A, 50114 Tartu, Estonia; tonn.paiste@ut.eeInstitute of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaInstitute of Geology, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, EstoniaInstitute of Geology, University of Tartu, Ravila 14A, 50114 Tartu, EstoniaMulti-proxy correlation is used to address the boundary of the Kukruse and Haljala regional stages across the Estonian part of the Baltoscandian Ordovician Palaeobasin. New biostratigraphic information on conodonts, chitinozoans and ostracods from the Peetri outcrop, northwestern Estonia, integrated with micropalaeontological data from five core sections all over Estonia, allows justification of the position of the stage boundary and correlation between conodont and chitinozoan biozones. In the Peetri outcrop a marked stratigraphic hiatus was recognized at the Kukruse–Haljala boundary – the Baltoniodus gerdae conodont Subzone and the Armoricochitina granulifera, Angochitina curvata, Lagenochitina dalbyensis and Belonechitina hirsuta chitinozoan zones are missing in the section. The lowermost part of the Tatruse Formation in central Estonia and the Adze Formation in southern Estonia are older than previously thought, and the results show a principal advantage of the multi-proxy method over single-group studies. The lower boundary of the Haljala Regional Stage is tied to the interval with gaps that are common all over the stratotype region.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2020/issue_2/earth-2020-2-76-90.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tõnn Paiste Peep Männik Jaak Nõlvak Tõnu Meidla |
spellingShingle |
Tõnn Paiste Peep Männik Jaak Nõlvak Tõnu Meidla The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia Estonian Journal of Earth Sciences |
author_facet |
Tõnn Paiste Peep Männik Jaak Nõlvak Tõnu Meidla |
author_sort |
Tõnn Paiste |
title |
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia |
title_short |
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia |
title_full |
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia |
title_fullStr |
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia |
title_full_unstemmed |
The lower boundary of the Haljala Regional Stage (Sandbian, Upper Ordovician) in Estonia |
title_sort |
lower boundary of the haljala regional stage (sandbian, upper ordovician) in estonia |
publisher |
Estonian Academy Publishers |
series |
Estonian Journal of Earth Sciences |
issn |
1736-4728 1736-7557 |
publishDate |
2020-04-01 |
description |
Multi-proxy correlation is used to address the boundary of the Kukruse and Haljala regional stages across the Estonian part of the Baltoscandian Ordovician Palaeobasin. New biostratigraphic information on conodonts, chitinozoans and ostracods from the Peetri outcrop, northwestern Estonia, integrated with micropalaeontological data from five core sections all over Estonia, allows justification of the position of the stage boundary and correlation between conodont and chitinozoan biozones. In the Peetri outcrop a marked stratigraphic hiatus was recognized at the Kukruse–Haljala boundary – the Baltoniodus gerdae conodont Subzone and the Armoricochitina granulifera, Angochitina curvata, Lagenochitina dalbyensis and Belonechitina hirsuta chitinozoan zones are missing in the section. The lowermost part of the Tatruse Formation in central Estonia and the Adze Formation in southern Estonia are older than previously thought, and the results show a principal advantage of the multi-proxy method over single-group studies. The lower boundary of the Haljala Regional Stage is tied to the interval with gaps that are common all over the stratotype region. |
url |
http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2020/issue_2/earth-2020-2-76-90.pdf |
work_keys_str_mv |
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