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The hot-spot derived Mt. Pleasant Caldera eruptions c.370-345Ma coincide with Romer's Gap. 66.235.38.214 (talk) 09:08, 25 October 2012 (UTC)[reply]

how could lithospheric thinning have been occurring, whilst the Arcadian orogeny was co-occurring, in the same regions, at the same time? Mountains were uplifted, due to continent:continent collisions, over a hotspot? 66.235.38.214 (talk) 09:23, 25 October 2012 (UTC)[reply]

Inexpertly, massive flood basalts are associated with RRR triple junctions, e.g. Ontong-Java plateau in the Pacific. Now, the Mt. Pleasant Caldera erupted, at the triple junction, between (clockwise) North America, Europe, and Gondwana. Is such significant? 66.235.38.214 (talk) 10:41, 25 October 2012 (UTC)[reply]

The lat/long coordinates for the Mount Pleasant Caldera are incorrect. The centre of the caldera is approximately 45.5N/66.755W, and the Mount Pleasant mine site is at 45.424155N/66.818942W. The caldera complex is due south from Frederiction, New Brunswick, not west as indicated on the current page. The picture at https://en.wikipedia.org/wiki/Caldera#/media/File:Mount_Pleasant_Caldera.jpg is also incorrectly located and is not of the Mount Pleasant Caldera complex, but an unrelated pluton that extends to the border with Maine. This information can be confirmed by matching up features with the geology map of New Brunswick: http://www2.gnb.ca/content/dam/gnb/Departments/en/pdf/Minerals-Minerales/2007-18_c.pdf — Preceding unsigned comment added by 156.34.186.131 (talk) 10:55, 3 August 2015 (UTC)[reply]

I just updated the coordinates. You are absolutely right about that image being incorrectly located so I removed it from the Caldera article and nominated it for deletion. Volcanoguy 09:54, 4 August 2015 (UTC)[reply]

The comment(s) below were originally left at Talk:Mount Pleasant Caldera/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.

Last edited at 03:20, 18 April 2009 (UTC). Substituted at 00:32, 30 April 2016 (UTC)