DescriptionOnce upon a time, these stony corridors would have been a hellish environment of burning limestone. Each of the entrances leads to a large concave space which would have been packed with coal, creating a superheated calcite reaction. The resultant material was important for its use as building mortar in addition to being widely employed in agriculture as an effective fertiliser.
LicenseWhat does this mean? Attribution-NonCommercial License
Further informationLink: https://www.flickr.com/photos/8185633@N07/5837676586/
Resource type: Image
Added by: Pat Thomson
Last modified: 4 years, 8 months ago
Viewed: 580 times
Picture Taken: Unknown