Aluminosilicate haloes preserve complex life approximately 800 million years ago
Mudstone-hosted microfossils are a major component of the Proterozoic fossil record, particularly dominating the record of early eukaryotic life. Early organisms possessed no biomineralized parts to resist decay and controls on their fossilization in mudstones are poorly understood. Consequently, th...
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ftpubmed:oai:pubmedcentral.nih.gov:7333908 2023-05-15T15:06:56+02:00 Aluminosilicate haloes preserve complex life approximately 800 million years ago Anderson, Ross P. Tosca, Nicholas J. Cinque, Gianfelice Frogley, Mark D. Lekkas, Ioannis Akey, Austin Hughes, Gareth M. Bergmann, Kristin D. Knoll, Andrew H. Briggs, Derek E. G. 2020-08-06 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7333908/ http://www.ncbi.nlm.nih.gov/pubmed/32642055 https://doi.org/10.1098/rsfs.2020.0011 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7333908/ http://www.ncbi.nlm.nih.gov/pubmed/32642055 http://dx.doi.org/10.1098/rsfs.2020.0011 © 2020 The Author(s) https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdfhttps://royalsociety.org/journals/ethics-policies/data-sharing-mining/Published by the Royal Society. All rights reserved. Interface Focus Articles Text 2020 ftpubmed https://doi.org/10.1098/rsfs.2020.0011 2021-08-08T00:21:56Z Mudstone-hosted microfossils are a major component of the Proterozoic fossil record, particularly dominating the record of early eukaryotic life. Early organisms possessed no biomineralized parts to resist decay and controls on their fossilization in mudstones are poorly understood. Consequently, the Proterozoic fossil record is compromised—we do not know whether changing temporal/spatial patterns of microfossil occurrences reflect evolution or the distribution of favourable fossilization conditions. We investigated fossilization within the approximately 1000 Ma Lakhanda Group (Russia) and the approximately 800 Ma Svanbergfjellet and Wynniatt formations (Svalbard and Arctic Canada). Vertical sections of microfossils and surrounding matrices were extracted from thin sections by focused ion beam milling. Elemental mapping and synchrotron-based infrared microspectroscopy revealed that microfossils are surrounded by haloes rich in aluminium, probably hosted in kaolinite. Kaolinite has been implicated in Cambrian Burgess Shale-type (BST) fossilization and is known to slow the growth of degraders. The Neoproterozoic mudstone microfossil record may be biased to tropical settings conducive to kaolinite formation. These deposits lack metazoan fossils even though they share fossilization conditions with younger BST deposits that are capable of preserving non-mineralizing metazoans. Thus metazoans, at least those typically preserved in BST deposits, were probably absent from sedimentary environments before approximately 800 Ma. Text Arctic Svalbard PubMed Central (PMC) Arctic Burgess ENVELOPE(76.128,76.128,-69.415,-69.415) Canada Svalbard Svanbergfjellet ENVELOPE(18.194,18.194,78.682,78.682) Interface Focus 10 4 20200011 |
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Articles Anderson, Ross P. Tosca, Nicholas J. Cinque, Gianfelice Frogley, Mark D. Lekkas, Ioannis Akey, Austin Hughes, Gareth M. Bergmann, Kristin D. Knoll, Andrew H. Briggs, Derek E. G. Aluminosilicate haloes preserve complex life approximately 800 million years ago |
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Articles |
description |
Mudstone-hosted microfossils are a major component of the Proterozoic fossil record, particularly dominating the record of early eukaryotic life. Early organisms possessed no biomineralized parts to resist decay and controls on their fossilization in mudstones are poorly understood. Consequently, the Proterozoic fossil record is compromised—we do not know whether changing temporal/spatial patterns of microfossil occurrences reflect evolution or the distribution of favourable fossilization conditions. We investigated fossilization within the approximately 1000 Ma Lakhanda Group (Russia) and the approximately 800 Ma Svanbergfjellet and Wynniatt formations (Svalbard and Arctic Canada). Vertical sections of microfossils and surrounding matrices were extracted from thin sections by focused ion beam milling. Elemental mapping and synchrotron-based infrared microspectroscopy revealed that microfossils are surrounded by haloes rich in aluminium, probably hosted in kaolinite. Kaolinite has been implicated in Cambrian Burgess Shale-type (BST) fossilization and is known to slow the growth of degraders. The Neoproterozoic mudstone microfossil record may be biased to tropical settings conducive to kaolinite formation. These deposits lack metazoan fossils even though they share fossilization conditions with younger BST deposits that are capable of preserving non-mineralizing metazoans. Thus metazoans, at least those typically preserved in BST deposits, were probably absent from sedimentary environments before approximately 800 Ma. |
format |
Text |
author |
Anderson, Ross P. Tosca, Nicholas J. Cinque, Gianfelice Frogley, Mark D. Lekkas, Ioannis Akey, Austin Hughes, Gareth M. Bergmann, Kristin D. Knoll, Andrew H. Briggs, Derek E. G. |
author_facet |
Anderson, Ross P. Tosca, Nicholas J. Cinque, Gianfelice Frogley, Mark D. Lekkas, Ioannis Akey, Austin Hughes, Gareth M. Bergmann, Kristin D. Knoll, Andrew H. Briggs, Derek E. G. |
author_sort |
Anderson, Ross P. |
title |
Aluminosilicate haloes preserve complex life approximately 800 million years ago |
title_short |
Aluminosilicate haloes preserve complex life approximately 800 million years ago |
title_full |
Aluminosilicate haloes preserve complex life approximately 800 million years ago |
title_fullStr |
Aluminosilicate haloes preserve complex life approximately 800 million years ago |
title_full_unstemmed |
Aluminosilicate haloes preserve complex life approximately 800 million years ago |
title_sort |
aluminosilicate haloes preserve complex life approximately 800 million years ago |
publisher |
The Royal Society |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7333908/ http://www.ncbi.nlm.nih.gov/pubmed/32642055 https://doi.org/10.1098/rsfs.2020.0011 |
long_lat |
ENVELOPE(76.128,76.128,-69.415,-69.415) ENVELOPE(18.194,18.194,78.682,78.682) |
geographic |
Arctic Burgess Canada Svalbard Svanbergfjellet |
geographic_facet |
Arctic Burgess Canada Svalbard Svanbergfjellet |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_source |
Interface Focus |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7333908/ http://www.ncbi.nlm.nih.gov/pubmed/32642055 http://dx.doi.org/10.1098/rsfs.2020.0011 |
op_rights |
© 2020 The Author(s) https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdfhttps://royalsociety.org/journals/ethics-policies/data-sharing-mining/Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rsfs.2020.0011 |
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Interface Focus |
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10 |
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4 |
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20200011 |
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1766338520557813760 |