Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island
A complex sequence of cyclical marine and glaciomarine lithofacies exposed along the coastal lowlands of the Qivitu Peninsula was deposited during the marine transgressions and regressions that affected this area during repeated glaciation of the region. Multivariate analysis of amino acid ratios me...
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Canadian Science Publishing
1982
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Online Access: | http://dx.doi.org/10.1139/e82-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-079 |
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crcansciencepubl:10.1139/e82-079 2024-09-15T17:57:03+00:00 Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island Nelson, Alan R. 1982 http://dx.doi.org/10.1139/e82-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-079 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 19, issue 5, page 945-961 ISSN 0008-4077 1480-3313 journal-article 1982 crcansciencepubl https://doi.org/10.1139/e82-079 2024-07-25T04:10:03Z A complex sequence of cyclical marine and glaciomarine lithofacies exposed along the coastal lowlands of the Qivitu Peninsula was deposited during the marine transgressions and regressions that affected this area during repeated glaciation of the region. Multivariate analysis of amino acid ratios measured on shell fragments of the pelecypods Hiatella arctica and Myatruncata in the lithostratigraphic units provides a basis for their chronocorrelation through the use of informal regional aminostratigraphic units termed aminozones. All but the oldest aminozones correspond with particular lithostratigraphic units deposited during transgressive–regressive periods when relative sea level was higher than present sea level. Discriminant analysis shows total amino acid fraction allo/iso ratios from either species are the best overall criteria for assigning a shell sample to a particular aminozone, but free fraction allo/iso ratios are more useful in the younger zones. The distribution of ratios in lithostratigraphic units indicates a large proportion of shell fragments is reworked.Interpretation of all 14 C, uranium-series, paleomagnetic, and amino acid data from eastern Baffin Island suggests aminozone 1 is [Formula: see text] years BP, aminozone 2 is [Formula: see text] years BP, aminozone 3 is [Formula: see text] years BP, and aminozone 4 is [Formula: see text] years BP. The extent of isoleucine epimerization in shell samples indicates some aminozones may be of early or pre-Quaternary age. Article in Journal/Newspaper Baffin Island Baffin Canadian Science Publishing Canadian Journal of Earth Sciences 19 5 945 961 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
A complex sequence of cyclical marine and glaciomarine lithofacies exposed along the coastal lowlands of the Qivitu Peninsula was deposited during the marine transgressions and regressions that affected this area during repeated glaciation of the region. Multivariate analysis of amino acid ratios measured on shell fragments of the pelecypods Hiatella arctica and Myatruncata in the lithostratigraphic units provides a basis for their chronocorrelation through the use of informal regional aminostratigraphic units termed aminozones. All but the oldest aminozones correspond with particular lithostratigraphic units deposited during transgressive–regressive periods when relative sea level was higher than present sea level. Discriminant analysis shows total amino acid fraction allo/iso ratios from either species are the best overall criteria for assigning a shell sample to a particular aminozone, but free fraction allo/iso ratios are more useful in the younger zones. The distribution of ratios in lithostratigraphic units indicates a large proportion of shell fragments is reworked.Interpretation of all 14 C, uranium-series, paleomagnetic, and amino acid data from eastern Baffin Island suggests aminozone 1 is [Formula: see text] years BP, aminozone 2 is [Formula: see text] years BP, aminozone 3 is [Formula: see text] years BP, and aminozone 4 is [Formula: see text] years BP. The extent of isoleucine epimerization in shell samples indicates some aminozones may be of early or pre-Quaternary age. |
format |
Article in Journal/Newspaper |
author |
Nelson, Alan R. |
spellingShingle |
Nelson, Alan R. Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
author_facet |
Nelson, Alan R. |
author_sort |
Nelson, Alan R. |
title |
Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
title_short |
Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
title_full |
Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
title_fullStr |
Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
title_full_unstemmed |
Aminostratigraphy of Quaternary marine and glaciomarine sediments, Qivitu Peninsula, Baffin Island |
title_sort |
aminostratigraphy of quaternary marine and glaciomarine sediments, qivitu peninsula, baffin island |
publisher |
Canadian Science Publishing |
publishDate |
1982 |
url |
http://dx.doi.org/10.1139/e82-079 http://www.nrcresearchpress.com/doi/pdf/10.1139/e82-079 |
genre |
Baffin Island Baffin |
genre_facet |
Baffin Island Baffin |
op_source |
Canadian Journal of Earth Sciences volume 19, issue 5, page 945-961 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e82-079 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
19 |
container_issue |
5 |
container_start_page |
945 |
op_container_end_page |
961 |
_version_ |
1810433254326534144 |