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Joined 2026-09-21 Message
Incoming links: Ross N. Mitchell
Research by David A. D. Evans and Ross N. Mitchell, Geology 39(5), 443–446. Combines paleomagnetism with continental-margin records to reconstruct a core of Nuna and test its assembly and breakup. Author-hosted full text with supplementary material: earth.yale.edu/sites/default/files/2024-09/Evans%20doc%2043.pdf
David A. D. Evans Created 2026-10-25 Updated 2026-11-05
David A. D. Evans and Ross N. Mitchell combined paleomagnetism with the record of ancient continental margins to reconstruct a core of the supercontinent Nuna. Rotating same-age paleomagnetic poles into a common reconstruction tests whether the proposed continental neighbors share a compatible history. The study compared Siberia, Laurentia and Baltica, using agreement and later divergence of their records to constrain assembly and separation. These magnetic tests complement geological fits rather than assuming that a visually plausible arrangement uniquely reconstructs a vanished supercontinent.[ref]
Assembly and breakup of the core of Paleoproterozoic-Mesoproterozoic supercontinent Nuna by David A. D. Evans and Ross N. Mitchell. Introduction and Nuna reconstruction, paleomagnetic comparison and continental-margin constraints
A researcher in paleomagnetism and continental reconstruction, including supercontinent histories. Institutional profile: earth.yale.edu/profile/david-evans
Ross N. Mitchell Created 2026-10-25 Updated 2026-11-05
Ross N. Mitchell studies ancient continental configurations using paleomagnetism and the geological record of supercontinents. In a 2011 paper with David A. D. Evans, he combined dated magnetic-pole records with tectonic and stratigraphic correlations to reconstruct the core of Nuna. The reconstruction fitted the Siberian craton, Laurentia and Baltica together for an interval roughly 1.9–1.3 billion years ago and tested that fit against the histories of their margins.[ref]
Assembly and breakup of the core of Paleoproterozoic-Mesoproterozoic supercontinent Nuna by David A. D. Evans and Ross N. Mitchell. Abstract and Figure 1, pp. 443–444: quantitative reconstruction and independent geological correlations
This is a comparison between several kinds of evidence. Matching apparent polar wander paths constrains relative continental motion, while dated evidence of mountain building and continental-margin histories test whether the proposed neighbors experienced compatible events. Divergence between those records can indicate assembly or separation. The paper presents a particular reconstruction to be tested against further observations; its detailed fit is not implied merely by naming a supercontinent.
A researcher in paleomagnetism and supercontinent histories. Institutional profile: igg.cas.cn/sourcedb_igg_cas/cn/zjrck/yjy/201912/t20191219_5460988.htm
