Story: Sea floor geology

Hikurangi Channel

Hikurangi Channel

At a depth of up to 3 kilometres, the Hikurangi Channel cuts across Hikurangi Plateau and continues far out into the South Pacific Ocean. New Zealand’s tallest building, the Auckland Sky Tower (328 metres), would disappear up to its observation platform in the Hikurangi Channel. The fast-flowing flash floods that develop from avalanches at the channel’s head would easily cover the top of the tower’s aerials. Abyssal channels develop when these floods cause a build-up of the surrounding plains. The effect of the earth spinning causes more sediment to build up on one side of the channel than on the other.

Using this item

Te Ara - The Encyclopedia of New Zealand

This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.

Source: NIWA – National Institute of Water and Atmospheric Research

All images & media in this story

How to cite this page:

Keith Lewis, Scott D. Nodder and Lionel Carter, 'Sea floor geology - Abysses', Te Ara - the Encyclopedia of New Zealand, (accessed 14 April 2024)

Story by Keith Lewis, Scott D. Nodder and Lionel Carter, published 12 Jun 2006