Soft-sediment deformation structures from Lower Ordovician strata of the eastern Pyrenees

Canadian Journal of Earth Sciences, Volume 63, Issue , Page 1-9, January 2026.Soft-sediment deformation structures from basement rocks of the Pyrenees are reported for the first time. They occur in the Lower Ordovician Font Frède Member (Serdinya Formation), a heterolithic siliciclastic unit truncated by the Late Ordovician “Sardic” unconformity. These strata were deposited on a siliciclastic platform that fringed northwestern Gondwana. In proximal areas of this platform, soft