Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples
The rate of isoleucine epimerization in fossil planktonic foraminifera is strongly species-dependent. Alloisoleucine/isoleucine ratios of two species of the same age can vary by more than a factor of 2. This finding, in combination with the known temporal and spatial variability of foraminiferal ass...
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Language: | English |
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American Association for the Advancement of Science (AAAS)
1977
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Online Access: | http://dx.doi.org/10.1126/science.195.4284.1333 https://www.science.org/doi/pdf/10.1126/science.195.4284.1333 |
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craaas:10.1126/science.195.4284.1333 2024-06-23T07:56:16+00:00 Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples King, Kenneth Neville, Colleen 1977 http://dx.doi.org/10.1126/science.195.4284.1333 https://www.science.org/doi/pdf/10.1126/science.195.4284.1333 en eng American Association for the Advancement of Science (AAAS) Science volume 195, issue 4284, page 1333-1335 ISSN 0036-8075 1095-9203 journal-article 1977 craaas https://doi.org/10.1126/science.195.4284.1333 2024-05-30T08:05:28Z The rate of isoleucine epimerization in fossil planktonic foraminifera is strongly species-dependent. Alloisoleucine/isoleucine ratios of two species of the same age can vary by more than a factor of 2. This finding, in combination with the known temporal and spatial variability of foraminiferal assemblages, demonstrates the critical importance of basing geochronological studies of marine sediments on monospecific samples. One rapidly epimerizing species generates a calibration curve of potentially high precision for dating sediments between the ages of about 50,000 to 400,000 years. Article in Journal/Newspaper Planktonic foraminifera AAAS Resource Center (American Association for the Advancement of Science) Science 195 4284 1333 1335 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
The rate of isoleucine epimerization in fossil planktonic foraminifera is strongly species-dependent. Alloisoleucine/isoleucine ratios of two species of the same age can vary by more than a factor of 2. This finding, in combination with the known temporal and spatial variability of foraminiferal assemblages, demonstrates the critical importance of basing geochronological studies of marine sediments on monospecific samples. One rapidly epimerizing species generates a calibration curve of potentially high precision for dating sediments between the ages of about 50,000 to 400,000 years. |
format |
Article in Journal/Newspaper |
author |
King, Kenneth Neville, Colleen |
spellingShingle |
King, Kenneth Neville, Colleen Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
author_facet |
King, Kenneth Neville, Colleen |
author_sort |
King, Kenneth |
title |
Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
title_short |
Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
title_full |
Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
title_fullStr |
Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
title_full_unstemmed |
Isoleucine Epimerization for Dating Marine Sediments: Importance of Analyzing Monospecific Foraminiferal Samples |
title_sort |
isoleucine epimerization for dating marine sediments: importance of analyzing monospecific foraminiferal samples |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1977 |
url |
http://dx.doi.org/10.1126/science.195.4284.1333 https://www.science.org/doi/pdf/10.1126/science.195.4284.1333 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Science volume 195, issue 4284, page 1333-1335 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.195.4284.1333 |
container_title |
Science |
container_volume |
195 |
container_issue |
4284 |
container_start_page |
1333 |
op_container_end_page |
1335 |
_version_ |
1802649245235281920 |