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Geology

Making waves at the Brough of Birsay - photograph (c) 2016 David Bailey (not the)
Making waves at the Brough of Birsay - photograph (c) 2016 David Bailey (not the)
Making waves at the Brough of Birsay - photograph (c) 2016 David Bailey (not the)

Making waves at the Brough of Birsay

The Brough of Birsay on mainland Orkney was a Viking stronghold 1,000 years ago. 380 million years before that it was a huge inland lake in the Southern Hemisphere. Here are the fossilised ripples to prove it.