First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications
The most prominent of the two major global delta C-13 excursions in the Ordovician, the Hirnantian delta C-13 excursion (HICE), which is previously recorded from the uppermost Ordovician in a few sections in Nevada, Quebec, Arctic Canada, Baltoscandia, Scotland and China, is documented for the first...
Published in: | Geological Magazine |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Cambridge University Press
2006
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Online Access: | https://lup.lub.lu.se/record/388440 https://doi.org/10.1017/S0016756806002469 |
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ftulundlup:oai:lup.lub.lu.se:6bdb49da-fea7-4057-9338-2947e79f59cc 2023-05-15T15:07:25+02:00 First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications Bergstroem, Stig M. Saltzman, Matthew M. Schmitz, Birger 2006 https://lup.lub.lu.se/record/388440 https://doi.org/10.1017/S0016756806002469 eng eng Cambridge University Press https://lup.lub.lu.se/record/388440 http://dx.doi.org/10.1017/S0016756806002469 wos:000241142600005 scopus:33748313029 Geological Magazine; 143(5), pp 657-678 (2006) ISSN: 0016-7568 Geology sea-level changes glaciation Gondwana Missouri-Illinois Upper Ordovician carbon isotope excursion Hirnantian contributiontojournal/systematicreview info:eu-repo/semantics/article text 2006 ftulundlup https://doi.org/10.1017/S0016756806002469 2023-02-01T23:28:42Z The most prominent of the two major global delta C-13 excursions in the Ordovician, the Hirnantian delta C-13 excursion (HICE), which is previously recorded from the uppermost Ordovician in a few sections in Nevada, Quebec, Arctic Canada, Baltoscandia, Scotland and China, is documented for the first time from the North American Midcontinent. Samples through the Girardeau Limestone and Leemon Formation in Missouri and Illinois show elevated delta C-13 values of + 4 parts per thousand to + 5 parts per thousand. Although not determined precisely, the beginning of the HICE is likely to be in the upper part of the Orchard Creek Shale, and it ends in the upper Leemon Formation. Being extraordinarily useful chronostratigraphically, the presence of the HICE makes it possible to provide a firm dating of the study interval, whose age has long been controversial. Comparison between the study sections and coeval HICE sequences in North America and Europe show striking similarities, especially in sea-level history, indicating that major local lowstands reflect eustatic sea-level changes. A comparison with Hirnantian diamictite successions in North and South Africa and Argentina suggests that these lowstands correspond to two major Gondwanan glacial episodes. Article in Journal/Newspaper Arctic Lund University Publications (LUP) Arctic Canada Argentina Geological Magazine 143 5 657 678 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology sea-level changes glaciation Gondwana Missouri-Illinois Upper Ordovician carbon isotope excursion Hirnantian |
spellingShingle |
Geology sea-level changes glaciation Gondwana Missouri-Illinois Upper Ordovician carbon isotope excursion Hirnantian Bergstroem, Stig M. Saltzman, Matthew M. Schmitz, Birger First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
topic_facet |
Geology sea-level changes glaciation Gondwana Missouri-Illinois Upper Ordovician carbon isotope excursion Hirnantian |
description |
The most prominent of the two major global delta C-13 excursions in the Ordovician, the Hirnantian delta C-13 excursion (HICE), which is previously recorded from the uppermost Ordovician in a few sections in Nevada, Quebec, Arctic Canada, Baltoscandia, Scotland and China, is documented for the first time from the North American Midcontinent. Samples through the Girardeau Limestone and Leemon Formation in Missouri and Illinois show elevated delta C-13 values of + 4 parts per thousand to + 5 parts per thousand. Although not determined precisely, the beginning of the HICE is likely to be in the upper part of the Orchard Creek Shale, and it ends in the upper Leemon Formation. Being extraordinarily useful chronostratigraphically, the presence of the HICE makes it possible to provide a firm dating of the study interval, whose age has long been controversial. Comparison between the study sections and coeval HICE sequences in North America and Europe show striking similarities, especially in sea-level history, indicating that major local lowstands reflect eustatic sea-level changes. A comparison with Hirnantian diamictite successions in North and South Africa and Argentina suggests that these lowstands correspond to two major Gondwanan glacial episodes. |
format |
Article in Journal/Newspaper |
author |
Bergstroem, Stig M. Saltzman, Matthew M. Schmitz, Birger |
author_facet |
Bergstroem, Stig M. Saltzman, Matthew M. Schmitz, Birger |
author_sort |
Bergstroem, Stig M. |
title |
First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
title_short |
First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
title_full |
First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
title_fullStr |
First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
title_full_unstemmed |
First record of the Hirnantian (Upper Ordovician) delta C-13 excursion in the North American Midcontinent and its regional implications |
title_sort |
first record of the hirnantian (upper ordovician) delta c-13 excursion in the north american midcontinent and its regional implications |
publisher |
Cambridge University Press |
publishDate |
2006 |
url |
https://lup.lub.lu.se/record/388440 https://doi.org/10.1017/S0016756806002469 |
geographic |
Arctic Canada Argentina |
geographic_facet |
Arctic Canada Argentina |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geological Magazine; 143(5), pp 657-678 (2006) ISSN: 0016-7568 |
op_relation |
https://lup.lub.lu.se/record/388440 http://dx.doi.org/10.1017/S0016756806002469 wos:000241142600005 scopus:33748313029 |
op_doi |
https://doi.org/10.1017/S0016756806002469 |
container_title |
Geological Magazine |
container_volume |
143 |
container_issue |
5 |
container_start_page |
657 |
op_container_end_page |
678 |
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1766338925883817984 |