Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina
Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar material f...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/354167 2024-01-14T10:04:52+01:00 Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina Psarras, Christos Donoghue, Philip Garwood, Russell Grazhdankin, Dmitriy V Parry, Luke A Rogov, Vladimir I Liu, Alexander 2023-11 application/pdf https://www.repository.cam.ac.uk/handle/1810/354167 https://doi.org/10.17863/CAM.100076 eng eng Wiley Department of Earth Sciences Papers in Palaeontology https://www.repository.cam.ac.uk/handle/1810/354167 https://doi.org/10.17863/CAM.100076 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Ediacaran sedimentology taphonomy Nenoxites bioturbation petrology Article 2023 ftunivcam https://doi.org/10.17863/CAM.100076 2023-12-21T23:24:00Z Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar material from other global localities support a body fossil origin. Here we combine X-ray computed tomography (μCT), scanning electron microscopy (SEM), and petrographic methods to evaluate the body- or tracefossil nature of Nenoxites from the Khatyspyt Formation. The fossilised structures comprise densely-packed chains of three-dimensionally preserved silicic, bowl-shaped elements surrounded by distinct sedimentary halos, within a dolomitized matrix. Individual bowl-shaped elements can exhibit diffuse mineralogical boundaries and bridging connections between elements, both considered here to result from silicification and dolomitization during diagenesis. This new morphological and petrological evidence, in conjunction with recent studies of the late Ediacaran tubular taxa Ordinilunulatus and Shaanxilithes from China, leads us to conclude that the Khatyspyt specimens most likely reflect a coquina deposit of Shaanxilithes-like body fossils. Our data support the possibility of Shaanxilithes-like organisms representing total group eumetazoans. NERC (NE/L011409/1 and NE/P013678/1 Leverhulme Trust Research Fellowship (RF-2022-167). Early career fellowship from St. Edmund Hall, Oxford. Government Contract FWZZ-2022-0002 (Fundamental Scientific Research Programme of the Russian Federation). Russian Science Foundation (grant 20-67-46028) Article in Journal/Newspaper Arctic Siberia Apollo - University of Cambridge Repository Arctic |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
Ediacaran sedimentology taphonomy Nenoxites bioturbation petrology |
spellingShingle |
Ediacaran sedimentology taphonomy Nenoxites bioturbation petrology Psarras, Christos Donoghue, Philip Garwood, Russell Grazhdankin, Dmitriy V Parry, Luke A Rogov, Vladimir I Liu, Alexander Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
topic_facet |
Ediacaran sedimentology taphonomy Nenoxites bioturbation petrology |
description |
Fossil material assigned to Nenoxites from the late Ediacaran Khatyspyt Formation of Arctic Siberia (550–544 Ma) has been presented as evidence for bioturbation prior to the basal Cambrian boundary. However, that ichnological interpretation has been challenged, and descriptions of similar material from other global localities support a body fossil origin. Here we combine X-ray computed tomography (μCT), scanning electron microscopy (SEM), and petrographic methods to evaluate the body- or tracefossil nature of Nenoxites from the Khatyspyt Formation. The fossilised structures comprise densely-packed chains of three-dimensionally preserved silicic, bowl-shaped elements surrounded by distinct sedimentary halos, within a dolomitized matrix. Individual bowl-shaped elements can exhibit diffuse mineralogical boundaries and bridging connections between elements, both considered here to result from silicification and dolomitization during diagenesis. This new morphological and petrological evidence, in conjunction with recent studies of the late Ediacaran tubular taxa Ordinilunulatus and Shaanxilithes from China, leads us to conclude that the Khatyspyt specimens most likely reflect a coquina deposit of Shaanxilithes-like body fossils. Our data support the possibility of Shaanxilithes-like organisms representing total group eumetazoans. NERC (NE/L011409/1 and NE/P013678/1 Leverhulme Trust Research Fellowship (RF-2022-167). Early career fellowship from St. Edmund Hall, Oxford. Government Contract FWZZ-2022-0002 (Fundamental Scientific Research Programme of the Russian Federation). Russian Science Foundation (grant 20-67-46028) |
format |
Article in Journal/Newspaper |
author |
Psarras, Christos Donoghue, Philip Garwood, Russell Grazhdankin, Dmitriy V Parry, Luke A Rogov, Vladimir I Liu, Alexander |
author_facet |
Psarras, Christos Donoghue, Philip Garwood, Russell Grazhdankin, Dmitriy V Parry, Luke A Rogov, Vladimir I Liu, Alexander |
author_sort |
Psarras, Christos |
title |
Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
title_short |
Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
title_full |
Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
title_fullStr |
Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
title_full_unstemmed |
Three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
title_sort |
three-dimensional reconstruction, taphonomic and petrological data suggest the oldest record of bioturbation is a body fossil coquina |
publisher |
Wiley |
publishDate |
2023 |
url |
https://www.repository.cam.ac.uk/handle/1810/354167 https://doi.org/10.17863/CAM.100076 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Siberia |
genre_facet |
Arctic Siberia |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/354167 https://doi.org/10.17863/CAM.100076 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.100076 |
_version_ |
1788059301246402560 |