Story: Rock and mineral names

Greywacke under the microscope (2nd of 2)

Greywacke under the microscope

This is a thin section (a microscope slice, 3 millimetres wide) of greywacke – an assortment of angular grains in a fine-grained clay. The clear grains are mainly quartz, while many of the cloudy grains are feldspar.

Using this item

GNS Science
Photograph by Nick Mortimer

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

All images & media in this story
How to cite this page:

Simon Nathan, 'Rock and mineral names - Local names', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/en/photograph/9065/greywacke-under-the-microscope (accessed 9 June 2023)

Story by Simon Nathan, published 12 Jun 2006