Natural patterns of black, grey, and yellow lichens growing on Carboniferous limestone rocks at Broughton Bay on the Gower Peninsula.
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Jessica's Nature Blog 
Theres a 1950s feel to these colours and shapes, I think!
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Following the Festival of Britain in 1953 I think, a lot of “contemporary” fabric designs came out and my mother made some curtains with yellow and grey abstract motifs that would co-ordinate well with these lichens.
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