Exceptional preservation in calcareous nodules
Preservation of soft integument in calcareous nodules seems to be more widespread geographically and stratigraphically than hitherto realized. It cannot be recognized in the field, and to recover such material requires special etching techniques. Such preservation can be of exceptional quality, with...
Published in: | Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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The Royal Society
1985
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Online Access: | http://dx.doi.org/10.1098/rstb.1985.0139 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1985.0139 |
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crroyalsociety:10.1098/rstb.1985.0139 2024-09-15T18:37:41+00:00 Exceptional preservation in calcareous nodules 1985 http://dx.doi.org/10.1098/rstb.1985.0139 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1985.0139 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 311, issue 1148, page 67-73 ISSN 0080-4622 2054-0280 journal-article 1985 crroyalsociety https://doi.org/10.1098/rstb.1985.0139 2024-07-29T04:23:13Z Preservation of soft integument in calcareous nodules seems to be more widespread geographically and stratigraphically than hitherto realized. It cannot be recognized in the field, and to recover such material requires special etching techniques. Such preservation can be of exceptional quality, with fossils preserved three dimensionally either by secondary phosphatization or by silicification. Coating as well as the replacement of integument has been observed even within the same sample. Methodical search for such preservation may be based on the common denominators of depositional, geochemical, and environmental indicators in previously described occurrences. As such exceptionally preserved material may be rare within the samples, large quantities of rock have to be prepared. The examples described here are from anthraconitic limestones (Orsten) of the Upper Cambrian Alum Shale Formation in Sweden. They are now known from many localities and from different trilobite zones. In addition nodules from the Lower Cretaceous Santana Formation in Brazil, the Upper Devonian cephalopod limestone in the Carnic Alps, the Lower Triassic of Spitzbergen and the Miocene Barstow Formation in California have all yielded extremely fine material. Article in Journal/Newspaper Spitzbergen The Royal Society Philosophical Transactions of the Royal Society of London. B, Biological Sciences 311 1148 67 73 |
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The Royal Society |
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crroyalsociety |
language |
English |
description |
Preservation of soft integument in calcareous nodules seems to be more widespread geographically and stratigraphically than hitherto realized. It cannot be recognized in the field, and to recover such material requires special etching techniques. Such preservation can be of exceptional quality, with fossils preserved three dimensionally either by secondary phosphatization or by silicification. Coating as well as the replacement of integument has been observed even within the same sample. Methodical search for such preservation may be based on the common denominators of depositional, geochemical, and environmental indicators in previously described occurrences. As such exceptionally preserved material may be rare within the samples, large quantities of rock have to be prepared. The examples described here are from anthraconitic limestones (Orsten) of the Upper Cambrian Alum Shale Formation in Sweden. They are now known from many localities and from different trilobite zones. In addition nodules from the Lower Cretaceous Santana Formation in Brazil, the Upper Devonian cephalopod limestone in the Carnic Alps, the Lower Triassic of Spitzbergen and the Miocene Barstow Formation in California have all yielded extremely fine material. |
format |
Article in Journal/Newspaper |
title |
Exceptional preservation in calcareous nodules |
spellingShingle |
Exceptional preservation in calcareous nodules |
title_short |
Exceptional preservation in calcareous nodules |
title_full |
Exceptional preservation in calcareous nodules |
title_fullStr |
Exceptional preservation in calcareous nodules |
title_full_unstemmed |
Exceptional preservation in calcareous nodules |
title_sort |
exceptional preservation in calcareous nodules |
publisher |
The Royal Society |
publishDate |
1985 |
url |
http://dx.doi.org/10.1098/rstb.1985.0139 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.1985.0139 |
genre |
Spitzbergen |
genre_facet |
Spitzbergen |
op_source |
Philosophical Transactions of the Royal Society of London. B, Biological Sciences volume 311, issue 1148, page 67-73 ISSN 0080-4622 2054-0280 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.1985.0139 |
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Philosophical Transactions of the Royal Society of London. B, Biological Sciences |
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311 |
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1148 |
container_start_page |
67 |
op_container_end_page |
73 |
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1810482044685254656 |