Slate quarry, Stromness
The geology of Orkney lends itself well to quarrying. Much of the bedrock of the islands is sedimentary stone, laid down in the Devonian era, about 400 million years ago. Many traditional houses were roofed using slate from quarries all over Orkney, including this one at the Black Craig, on the western seaboard of Mainland Orkney. Tradition says that the names on the Naming Stone nearby were carved by the men working at the quarry, during their tea breaks.