Sunday stone, a calendar in rock
Wall Art and Photo Gifts from Mary Evans Picture Library
Sunday stone, a calendar in rock
Formed in a Tyneside coal mine in the 1800s, the white mineral barium sulphate, settled out in a water trough and during working shifts was blackened by coal dust. The resulting concretion formed a natural calendar, with a large white layer every Sunday when no work was taking place
Media ID 8615651
© Mary Evans / Natural History Museum
Calendar Coal Limestone Mine Mineral Sedimentary Sedimentary Rock Sulfate Sulfate Mineral Sulphate Sunday Wavy
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