weathered, eroded sea cliffs at hermaness on the island of unst in shetland, scotland, uk.

542 1000 ago altered approximately bedrock cliff cliffs cracked eroded erosion formed fracture fractured fractures gneissose grade herma hermaness high horizontal island islands later layer layers metamorphic metamorphism million moine nature ness originally people psammite regional rock rocks scotland scottish sea sedimentary semipelite shetland shetlands stone strata supergroup this unst weathered years