Abstract
A conodont fauna including several species of Cordylodus was retrieved from two glacial siltstone boulders found on the shore of Lilltuppen, a small island immediately off the Swedish coast in the Gulf of Bothnia at c. 61°N, 17°E. The erratics are remnants of a poorly known level in the Swedish stratigraphic succession. They probably derive from a nearby point on the floor of the Baltic Sea and constitute an example of an “eastern facies”, reminiscent of part of the Kallavere Formation in northern Estonia. The conodont fauna closely resembles that of the Maardu Member of the Kallavere Formation, and indicates a position in the Cordylodus lindstromi conodont zone just at the Cambrian–Ordovician boundary.
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