Story: Mountains

Greywacke and schist

Greywacke and schist

The Southern Alps, Kaikōura ranges and North Island axial ranges are formed mainly from a hard, grey sandstone which in New Zealand is called greywacke (left). When it is deeply buried and heated, greywacke is converted to a flaky rock called schist (right). The western side of the alps has been uplifted more than the east, so the deeper layers that contain schist are revealed there.

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Photograph by Nick Mortimer

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How to cite this page:

Andy Dennis, 'Mountains - How mountains form', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/photograph/14316/greywacke-and-schist (accessed 20 August 2022)

Story by Andy Dennis, published 24 Sep 2007, updated 1 Feb 2017