A Late Cretaceous true polar wander oscillation

True polar wander (TPW), or planetary reorientation, is well documented for other planets and moons and for Earth at present day with satellites, but testing its prevalence in Earth’s past is complicated by simultaneous motions due to plate tectonics. Debate has surrounded the existence of Late Cret...

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Autores principales: Mitchell, Ross N., Thissen, Christopher J., Evans, David A. D., Slotznick, Sarah P., Coccioni, Rodolfo, Yamazaki, Toshitsugu, Kirschvink, Joseph L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8206135/
https://www.ncbi.nlm.nih.gov/pubmed/34131126
http://dx.doi.org/10.1038/s41467-021-23803-8
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author Mitchell, Ross N.
Thissen, Christopher J.
Evans, David A. D.
Slotznick, Sarah P.
Coccioni, Rodolfo
Yamazaki, Toshitsugu
Kirschvink, Joseph L.
author_facet Mitchell, Ross N.
Thissen, Christopher J.
Evans, David A. D.
Slotznick, Sarah P.
Coccioni, Rodolfo
Yamazaki, Toshitsugu
Kirschvink, Joseph L.
author_sort Mitchell, Ross N.
collection PubMed
description True polar wander (TPW), or planetary reorientation, is well documented for other planets and moons and for Earth at present day with satellites, but testing its prevalence in Earth’s past is complicated by simultaneous motions due to plate tectonics. Debate has surrounded the existence of Late Cretaceous TPW ca. 84 million years ago (Ma). Classic palaeomagnetic data from the Scaglia Rossa limestone of Italy are the primary argument against the existence of ca. 84 Ma TPW. Here we present a new high-resolution palaeomagnetic record from two overlapping stratigraphic sections in Italy that provides evidence for a ~12° TPW oscillation from 86 to 78 Ma. This observation represents the most recent large-scale TPW documented and challenges the notion that the spin axis has been largely stable over the past 100 million years.
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spelling pubmed-82061352021-07-01 A Late Cretaceous true polar wander oscillation Mitchell, Ross N. Thissen, Christopher J. Evans, David A. D. Slotznick, Sarah P. Coccioni, Rodolfo Yamazaki, Toshitsugu Kirschvink, Joseph L. Nat Commun Article True polar wander (TPW), or planetary reorientation, is well documented for other planets and moons and for Earth at present day with satellites, but testing its prevalence in Earth’s past is complicated by simultaneous motions due to plate tectonics. Debate has surrounded the existence of Late Cretaceous TPW ca. 84 million years ago (Ma). Classic palaeomagnetic data from the Scaglia Rossa limestone of Italy are the primary argument against the existence of ca. 84 Ma TPW. Here we present a new high-resolution palaeomagnetic record from two overlapping stratigraphic sections in Italy that provides evidence for a ~12° TPW oscillation from 86 to 78 Ma. This observation represents the most recent large-scale TPW documented and challenges the notion that the spin axis has been largely stable over the past 100 million years. Nature Publishing Group UK 2021-06-15 /pmc/articles/PMC8206135/ /pubmed/34131126 http://dx.doi.org/10.1038/s41467-021-23803-8 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Mitchell, Ross N.
Thissen, Christopher J.
Evans, David A. D.
Slotznick, Sarah P.
Coccioni, Rodolfo
Yamazaki, Toshitsugu
Kirschvink, Joseph L.
A Late Cretaceous true polar wander oscillation
title A Late Cretaceous true polar wander oscillation
title_full A Late Cretaceous true polar wander oscillation
title_fullStr A Late Cretaceous true polar wander oscillation
title_full_unstemmed A Late Cretaceous true polar wander oscillation
title_short A Late Cretaceous true polar wander oscillation
title_sort late cretaceous true polar wander oscillation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8206135/
https://www.ncbi.nlm.nih.gov/pubmed/34131126
http://dx.doi.org/10.1038/s41467-021-23803-8
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