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It appears that the Alpine Fault and the Macquarie Fault Zone are extensions of each other, i.e. two different names for the same fault zone. Comment? --Bejnar (talk) 00:20, 28 May 2012 (UTC)
They're always described separately. The Macquarie Fault Zone originated as a spreading centre and is entirely within oceanic crust, whereas the Alpine Fault is within continental crust. It's not unusual for a plate boundaries to be given different names as the character changes along their lengths - mid-oceanic ridges do it all the time, e.g. the Reykjanes Ridge and the Kolbeinsey Ridge. Mikenorton (talk) 06:49, 28 May 2012 (UTC)