title: The late BarremianHalimedideshorizon of the Dolomites (Southern Alps, Italy).
abstract: A new trace fossil marker level, theHalimedideshorizon, is proposed for the Lower Cretaceous pelagic to hemipelagic succession of the Puez area (Southern Alps, Italy). The horizon occurs in the middle part of the late BarremianGerhardtia sartousianaZone (Gerhardtia sartousianaSubzone). It is approximately 20 cm thick and restricted to the uppermost part of the Puez Limestone Member (marly limestones; Hauterivian-Barremian; Puez Formation). It is fixed to the top 20 cm of bed P1/204. The grey-whitish limestone bed of theG. sartousianaZone is penetrated by Aptian red marls-siltstones of the Redbed Member. The horizon is documented for the first time from the Southern Alps, including the Dolomites, and can be correlated with other Mediterranean localities. The trace fossil assemblage of this marker bed with the co-occurrence ofHalimedides,SpongeliomorphaandZoophycossheds light on the Lower Cretaceous sedimentological history and current system of the Puez area within the Dolomites. It also highlights the palaeoenvironmental evolution of basins and plateaus and provides insights into the late Barremian interval.
authors.affiliation: Natural History Museum, Geological-Palaeontological Department, Burgring 7, 1010 Wien, Austria.
authors.forename: Alexander
authors.initials: A
authors.lastname: Lukeneder
authors.affiliation: Institute of Geological Sciences, Jagiellonian University, Oleandry 2a, 30-063 Kraków, Poland.
authors.forename: Alfred
authors.initials: A
authors.lastname: Uchman
authors.affiliation: Laboratoire de Géologie de Lyon, Université Claude-Bernard, Lyon 1, UMR 5276 CNRS, Domaine Scientifique de La Doua, Géode - 2, rue Raphaël Dubois, F-69622 Villeurbanne Cedex, France.
authors.forename: Christian
authors.initials: C
authors.lastname: Gaillard
authors.affiliation: Laboratoire de Géologie de Lyon, Université Claude-Bernard, Lyon 1, UMR 5276 CNRS, Domaine Scientifique de La Doua, Géode - 2, rue Raphaël Dubois, F-69622 Villeurbanne Cedex, France.
authors.forename: Davide
authors.initials: D
authors.lastname: Olivero
keywords: Dolomites; Halimedides horizon; Italy; Late Barremian hiatus; Lower Cretaceous; Sedimentation discontinuity