Basal quartzite and Torridonian sandstone rock fragments, parts of the Knockan Puzzle at the Knockan Crag National Nature Reserve, Highlands, Scotland, UK, by alimdi Arterra Philippe Clment Stock Photo - Afloimages
Basal quartzite and Torridonian sandstone rock fragments, parts of the Knockan Puzzle at the Knockan Crag National Nature Reserve, Highlands, Scotland, UK, by alimdi / Arterra / Philippe Clément