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trace of the day

Trace of the day: Piscichnus

The seafloor of the Ligurian Sea is more than an expanse of sand. In fact, it often features traces of life-substrate interactions, such as these circular 'craters'. What are they? They are feeding pits produced by fishes, almost identical to the trace fossil Piscichnus. This…

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Traces of the day: Siphonichnus and Teichichnus

Today I photographed paired openings on the seafloor. These openings have been produced by burrowing bivalves (clams) to keep contact with the oxygenated seawater. The fossil burrows Siphonichnus and Teichichnus are possible analogues of this burrow system, spotted on the sandy seafloor of the Ligurian…

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Trace of the day: Thalassinoides

On some seafloors of the Ligurian Sea, sediment mounds tower smaller openings. Each mound is likely to be connected with the nearby openings, forming a tunnel system that resembles the fossil burrow Thalassinoides. Thalassinoides is a genus of fossil burrow consisting of horizontal branched tunnels…

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