Trace fossils from the Dividalen Group of northern Finland with remarks on early Cambrian trace fossil provincialism

摘要

The Dividalen Group is exposed in a narrow zone along the eastern Caledonian front of northern Fennoscandia. Trace fossils provide important age constraints in these largely siliciclastic strata and demonstrate that in Sweden the entire Dividalen Group is of Cambrian age. Here we provide the first detailed description of trace fossils from the Dividalen Group in Finland, based on new material from the Kilpisjarvi area. This material includes the vertical spiral Gyrolithes polonicus and trace fossils with a three-lobed lower surface, here informally described as the Bure ichnocomplex. These trace fossils have a wide distribution in Baltica and probably represent a rare case of trace fossil provincialism.