Age: Upper Cambrian
The 'Orsten' rocks are located in southern Sweden. The areas mainly associated with these rocks are Västergötland, Skånia and the island of Öland (Muller, 1990).
The black areas on the map represent localities that yielded phosphatised arthropods.
The arrows refer to Orsten rocks discovered outside Sweden. (Map adapted from D. Walossek's home page)