Talk:Nastapoka arc

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Additional sources[edit]

Here are some additional sources found via a 'net search:

http://webecoist.momtastic.com/2011/08/02/ahead-of-the-curve-hudson-bays-semicircular-nastapoka-arc/ -- popular essay, but has a some good links (including one to Beal's essay).
http://www.cbc.ca/sevenwonders/more_wonders_nunavut.html -- (scroll down) Commentary piece on why the Arc is neat.
https://scripts.mit.edu/~birge/blog/hudson-bay-arc-mystery/ -- Blog entry with links to some more recent papers.

Hope this helps, JesseW, the juggling janitor 23:48, 14 February 2015 (UTC)

And this one: http://www.uwgb.edu/dutchs/Planets/impact-No.htm with examples of other non-craters. JesseW, the juggling janitor 23:51, 14 February 2015 (UTC)

Explanation[edit]

"Given the lack of evidence for an impact crater, the arc is now commonly regarded to be an arcuate boundary created during the Trans-Hudson orogeny, of tectonic origin between the Belcher Fold Belt and granitic rocks of the Superior Craton"

Jargon-free explanation of arc origin required here. — Muckapedia (talk) 3^e juil. 2015 10h51 (−4h)

Occam's razor[edit]

More investigation needs to go into looking at the origin of this geological feature, it's too conspicuous not to have formed by a volcano or meteorite. Rhoadess (talk) 15:46, 28 July 2016 (UTC)[reply]

It has already been done and published. An immense amount of peer-reviewed, published research has already gone into directly looking at the surface and shallow subsurface and indirectly through various geophysical techniques at the crustal and subcrustal geology of the Bletcher Islands, Nastapoka arc, and Hudson Bay. In it there is a deafening absence of any lithologic, tectonic, or stratigraphic indicator of either an extraterrestrial impact or volcanis eruption of any size that can be associated with it. Just plate tectonics with a Precambian flavor to it. The Nastapoka arc is a well-documented and even classic example that there are other processes besides volcanoes and asteroid impacts that produce large circular structures. What someone needs to do is read through and summarized what already has been published on this features. Paul H. (talk) 21:53, 28 July 2016 (UTC)[reply]