Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway
The Ediacaran to Cambrian transition of the Digermul Peninsula consists of an ichnologically rich, thick, conformable, shallow-marine siliciclastic succession that crosses the Neoproterozoic–Cambrian boundary. The Tanafjord section has been independently dated by published palynological and new body...
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ftdatacite:10.6084/m9.figshare.c.3462561 2023-05-15T16:13:37+02:00 Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway McIlroy, Duncan Brasier, Martin D. 2016 https://dx.doi.org/10.6084/m9.figshare.c.3462561 https://figshare.com/collections/Ichnological_evidence_for_the_Cambrian_explosion_in_the_Ediacaran_to_Cambrian_succession_of_Tanafjord_Finnmark_northern_Norway/3462561 unknown Figshare https://dx.doi.org/10.1144/sp448.7 CC-BY https://creativecommons.org/licenses/by/4.0 CC-BY Geology FOS Earth and related environmental sciences Collection article 2016 ftdatacite https://doi.org/10.6084/m9.figshare.c.3462561 https://doi.org/10.1144/sp448.7 2021-11-05T12:55:41Z The Ediacaran to Cambrian transition of the Digermul Peninsula consists of an ichnologically rich, thick, conformable, shallow-marine siliciclastic succession that crosses the Neoproterozoic–Cambrian boundary. The Tanafjord section has been independently dated by published palynological and new body fossil discoveries. As is also observed at the current Global Stratotype Section and Point (GSSP) for the Ediacaran–Cambrian boundary at Fortune Head in Newfoundland, Canada, there is a marked increase in burrow size and inferred behavioural diversity around the inferred boundary level at a surface without a significant hiatus. The diversity of this trace fossil assemblage presents an opportunity to compare the ichnological first appearance datums between the GSSP and another sedimentologically similar, but palaeogeographically remote, succession. We found that the first appearance datums of taxa in Finnmark broadly support the definition and stratigraphic extents of the Harlaniella podolica , Treptichnus pedum , Rusophycus avalonensis and Cruziana tenella zones. Our work shows that there is a marked increase in ichnodiversity in the lowermost Fortunian, mostly in the form of shallow tier traces. The main post-Fortunian ichnological innovation is the evolution of bulk sediment deposit feeding that is first evidenced by spreiten burrows at around the base of Cambrian Stage 2 in both the GSSP and in the Tanafjord section. Article in Journal/Newspaper Finnmark Newfoundland Northern Norway Finnmark DataCite Metadata Store (German National Library of Science and Technology) Canada Norway Burrows ENVELOPE(163.650,163.650,-74.300,-74.300) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences McIlroy, Duncan Brasier, Martin D. Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
The Ediacaran to Cambrian transition of the Digermul Peninsula consists of an ichnologically rich, thick, conformable, shallow-marine siliciclastic succession that crosses the Neoproterozoic–Cambrian boundary. The Tanafjord section has been independently dated by published palynological and new body fossil discoveries. As is also observed at the current Global Stratotype Section and Point (GSSP) for the Ediacaran–Cambrian boundary at Fortune Head in Newfoundland, Canada, there is a marked increase in burrow size and inferred behavioural diversity around the inferred boundary level at a surface without a significant hiatus. The diversity of this trace fossil assemblage presents an opportunity to compare the ichnological first appearance datums between the GSSP and another sedimentologically similar, but palaeogeographically remote, succession. We found that the first appearance datums of taxa in Finnmark broadly support the definition and stratigraphic extents of the Harlaniella podolica , Treptichnus pedum , Rusophycus avalonensis and Cruziana tenella zones. Our work shows that there is a marked increase in ichnodiversity in the lowermost Fortunian, mostly in the form of shallow tier traces. The main post-Fortunian ichnological innovation is the evolution of bulk sediment deposit feeding that is first evidenced by spreiten burrows at around the base of Cambrian Stage 2 in both the GSSP and in the Tanafjord section. |
format |
Article in Journal/Newspaper |
author |
McIlroy, Duncan Brasier, Martin D. |
author_facet |
McIlroy, Duncan Brasier, Martin D. |
author_sort |
McIlroy, Duncan |
title |
Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
title_short |
Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
title_full |
Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
title_fullStr |
Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
title_full_unstemmed |
Ichnological evidence for the Cambrian explosion in the Ediacaran to Cambrian succession of Tanafjord, Finnmark, northern Norway |
title_sort |
ichnological evidence for the cambrian explosion in the ediacaran to cambrian succession of tanafjord, finnmark, northern norway |
publisher |
Figshare |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.3462561 https://figshare.com/collections/Ichnological_evidence_for_the_Cambrian_explosion_in_the_Ediacaran_to_Cambrian_succession_of_Tanafjord_Finnmark_northern_Norway/3462561 |
long_lat |
ENVELOPE(163.650,163.650,-74.300,-74.300) |
geographic |
Canada Norway Burrows |
geographic_facet |
Canada Norway Burrows |
genre |
Finnmark Newfoundland Northern Norway Finnmark |
genre_facet |
Finnmark Newfoundland Northern Norway Finnmark |
op_relation |
https://dx.doi.org/10.1144/sp448.7 |
op_rights |
CC-BY https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.3462561 https://doi.org/10.1144/sp448.7 |
_version_ |
1765999404485967872 |