Story: Geology – overview

Greenland Group (1st of 2)

Greenland Group

One of the most widespread rock units on the western side of the South Island is the Greenland Group – a thick, uniform sequence of quartzose greywacke and argillite, deposited in earliest Ordovician time (about 490 million years ago). This photograph was taken at Seventeen Mile Bluff, on the coast north of Greymouth.

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Photograph by Simon Nathan

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How to cite this page:

Eileen McSaveney and Simon Nathan, 'Geology – overview - New Zealand’s oldest rocks', Te Ara - the Encyclopedia of New Zealand, (accessed 21 April 2024)

Story by Eileen McSaveney and Simon Nathan, published 12 Jun 2006