Microbial wrinkle structures in Lower Devonian shales, Wormit, Fife

This report describes the first recorded occurrence of microbial wrinkle structures in Lower Devonian sediments in Scotland. A shale horizon at Wormit, NE Fife, has yielded a distinctive puckered surface that is interpreted as the product of microbial mats on a soft sediment substrate. This assemblage reflects a shallow-water lacustrine or sub-tidal environment.