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The discovery of a Zoophycos-group trace fossil questionably attributed to Echinospira is reported from the Middle Pennsylvanian Sydney Mines Formation of Nova Scotia. Zoophycos-group trace fossils are composed of a central axis from which helicoidally arranged sheets of spreite emanate, giving the appearance of stacked cones. Such traces are commonly reported from marine paleoenvironments throughout the Phanerozoic. This occurrence, the rst of its kind in the Maritimes Basin, provides further evidence for marine inuence during the deposition of these dominantly terrestrial coal-bearing successions.   RESUME  On signale la decouverte d’un ichnofossile du groupe Zoophycos rattache de facon douteuse a Echinospira dans la formation du Pennsylvanien moyen de Sydney Mines, en Nouvelle-Ecosse. Les ichnofossiles du groupe Zoophycos sont constitues d’un axe central duquel emanent des feuilles de spreite disposees de facon heliocoidale leur conferant l’aspect de cones etages. Ces ichnofossiles sont communement signales dans les paleoenvironnements marins du Phanerozoique. La presence de cet ichnofossile particulier, premier du genre dans le bassin des Maritimes, fournit une autre preuve de l’inuence marine pendant la sedimentation de ces successions carboniferes en predominance terrestres.  [Traduit par la redaction]

atlantic geology

Discovery and paleoenvironmental implications of a Zoophycos-group trace fossil (?Echinospira) from the Middle Pennsylvanian Sydney Mines Formation of Nova Scotia