Cup and Ring Marks / Rock Art
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You can see that the black stuff mentioned in rockartuk's post has increased - I reckon it's some kind of lichen.
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Image Credit: Emma Alsop
Posted by Emma A
1st July 2012ce
Edited 1st July 2012ce |
NB: Unless otherwise stated, this image is protected under the copyright of the original poster and may not be re-used without permission.
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