Story: Rock, limestone and clay



This thin section of limestone from Raglan, South Auckland, shows the tiny sea creatures (in this case foraminifera) that make up the rock. Made of calcium carbonate, billions of skeletons and shells of ancient sea creatures have cemented together to form the rock. This process is continuous – off the shallow seas of New Zealand the limestone of the future is slowly forming as marine organisms die and sink to the sea floor.

Using this item

GNS Science
Reference: CN04632/8

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

All images & media in this story

How to cite this page:

Carl Walrond, 'Rock, limestone and clay - Limestone', Te Ara - the Encyclopedia of New Zealand, (accessed 22 April 2024)

Story by Carl Walrond, published 12 Jun 2006