Talk:Geology of New Zealand

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Rifting in North Island[edit]

I have just read "In Search of New Zealand", Hamish Campbell and Gerard Hutching 2007, and it says the Taupo Volcanic Zone is the result of "back-arc rifting", which has "rotated Northland away from East Cape". I presume the back-arc rifting is what Back-arc basin discusses.

So, while "The East Coast of the North Island is also rotating clockwise, relative to Northland," could be considered consistent with that, it is misleading IMO. Is it accepted that the zone is a back-arc basin, and is it an extension of the Lau basin referred to in the back-arc basin article?

The book's approach leads to an appealing explanation of how the forms of the north half of the North Island arose. A typical volcanic arc forms over the Pacific plate subduction to form Northland, it is rifted away, then the Coromandel and Kaimai ranges are formed, then rifted away. Is this explanation sensible?

Jlittlenz (talk) 03:50, 3 March 2010 (UTC)

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