Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia
Abstract A Late Ordovician brachiopod fauna from the Black River quadrangle (D-1 1:63,360 scale) of east-central Alaska comprises taxa typical of the Late Ordovician brachiopod fauna in the pericratonic epeiric seas of Laurentia, including Hesperorthis pyramidalis (Twenhofel, 1928), Plaesiomys occid...
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Online Access: | http://dx.doi.org/10.1017/jpa.2020.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336020000104 |
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crcambridgeupr:10.1017/jpa.2020.10 2024-09-15T18:18:10+00:00 Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia Jin, Jisuo Blodgett, Robert B. 2020 http://dx.doi.org/10.1017/jpa.2020.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336020000104 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of Paleontology volume 94, issue 4, page 637-652 ISSN 0022-3360 1937-2337 journal-article 2020 crcambridgeupr https://doi.org/10.1017/jpa.2020.10 2024-07-31T04:04:15Z Abstract A Late Ordovician brachiopod fauna from the Black River quadrangle (D-1 1:63,360 scale) of east-central Alaska comprises taxa typical of the Late Ordovician brachiopod fauna in the pericratonic epeiric seas of Laurentia, including Hesperorthis pyramidalis (Twenhofel, 1928), Plaesiomys occidentalis (Okulitch, 1943), Eoplectodonta sp., Holtehdalina sp., Leptaena sp., Brevilamnulella minuta n. sp., Tcherskidium tenuicostatum n. sp., Rhynchotrema iowense Wang, 1949, and Whitfieldella sp. The presence of Plaesiomys occidentalis and Tcherskidium tenuicostata n. sp. indicates a latest Katian age by correlation with similar species in the Mackenzie Mountains, southern Manitoba, Anticosti Island, the American midcontinent, Kolyma, and Siberia. Cluster analysis based on 20 well-studied late Katian brachiopod faunas from various regions within Laurentia and elsewhere in other tectonic plates suggests that the small brachiopod faunule from Alaska has the strongest paleobiogeographic affinity with Laurentia, confirming that the Black River quadrangle of Alaska was part of Laurentia during the Late Ordovician. UUID: http://zoobank.org/6b387856-61d5-4685-a592-faf5287c1e0f Article in Journal/Newspaper Mackenzie mountains Alaska Siberia Cambridge University Press Journal of Paleontology 94 4 637 652 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract A Late Ordovician brachiopod fauna from the Black River quadrangle (D-1 1:63,360 scale) of east-central Alaska comprises taxa typical of the Late Ordovician brachiopod fauna in the pericratonic epeiric seas of Laurentia, including Hesperorthis pyramidalis (Twenhofel, 1928), Plaesiomys occidentalis (Okulitch, 1943), Eoplectodonta sp., Holtehdalina sp., Leptaena sp., Brevilamnulella minuta n. sp., Tcherskidium tenuicostatum n. sp., Rhynchotrema iowense Wang, 1949, and Whitfieldella sp. The presence of Plaesiomys occidentalis and Tcherskidium tenuicostata n. sp. indicates a latest Katian age by correlation with similar species in the Mackenzie Mountains, southern Manitoba, Anticosti Island, the American midcontinent, Kolyma, and Siberia. Cluster analysis based on 20 well-studied late Katian brachiopod faunas from various regions within Laurentia and elsewhere in other tectonic plates suggests that the small brachiopod faunule from Alaska has the strongest paleobiogeographic affinity with Laurentia, confirming that the Black River quadrangle of Alaska was part of Laurentia during the Late Ordovician. UUID: http://zoobank.org/6b387856-61d5-4685-a592-faf5287c1e0f |
format |
Article in Journal/Newspaper |
author |
Jin, Jisuo Blodgett, Robert B. |
spellingShingle |
Jin, Jisuo Blodgett, Robert B. Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
author_facet |
Jin, Jisuo Blodgett, Robert B. |
author_sort |
Jin, Jisuo |
title |
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
title_short |
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
title_full |
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
title_fullStr |
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
title_full_unstemmed |
Late Ordovician brachiopods from east-central Alaska, northwestern margin of Laurentia |
title_sort |
late ordovician brachiopods from east-central alaska, northwestern margin of laurentia |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/jpa.2020.10 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022336020000104 |
genre |
Mackenzie mountains Alaska Siberia |
genre_facet |
Mackenzie mountains Alaska Siberia |
op_source |
Journal of Paleontology volume 94, issue 4, page 637-652 ISSN 0022-3360 1937-2337 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/jpa.2020.10 |
container_title |
Journal of Paleontology |
container_volume |
94 |
container_issue |
4 |
container_start_page |
637 |
op_container_end_page |
652 |
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1810456293203247104 |