Trace fossils in Quaternary glacial varved clays near Uppsala, Sweden

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Abstract
Trace fossils Broomichnium cf. fliri, Glaciichnium cf. liebegastensis, Planolites isp., ?Undichna isp. and ?Warvichnium ulbrichi have been recognised in early Holocene glacial varved clays near Vittinge, west of Uppsala, Sweden. They are referred to different arthropods and fishes that periodically colonised the lake floor and were important components of the ecosystem. The trace fossils are typical of the Glaciichnium ichnocoenosis within the Mermia ichnofacies, which suggests less stressful conditions in Vittinge than in many other Quaternary varved clays in Europe typified by the Cochlichnus ichnocoenosis.

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