Story: Rock, limestone and clay

Horokiwi quarry, Wellington

Horokiwi quarry, Wellington

In this view of the Horokiwi quarry face, the vehicle at the base provides a sense of scale. The vertical beds consist of hard, fractured greywacke (light grey), which is intersected with thin layers of black argillite. Greywacke is the rock type most commonly used for aggregate in New Zealand.

Using this item

GNS Science
Reference: CN34040/21
Photograph by Lloyd Homer

Permission of GNS Science must be obtained before any use of this image.

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How to cite this page:

Carl Walrond, 'Rock, limestone and clay - Raw materials', Te Ara - the Encyclopedia of New Zealand, (accessed 28 June 2022)

Story by Carl Walrond, published 12 Jun 2006