Calcined limestone
Introduction
The photograph on this page of Calcined limestone by Rudi Winter as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Calcined limestone
Image: © Rudi Winter Taken: 8 Jun 2014
There are numerous lime kilns around the southern tip of Wren's Nest, where the local limestone would have been calcined in order to drive off carbon dioxide and turn the calcium carbonate mineral into calcium oxide. If there is any iron present in the rock, it will be oxidised to Fe(III), which causes a red colouration. Although I am not certain, this loose material could be the result of that process.
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
52.520713
Longitude
-2.093246