Fernández Fernández, A.Moro Benito, M. C.2017-03-092017-03-091995http://hdl.handle.net/10272/13433The paleobiostratigraphic characteristics o f the Ordovician ironstones and the Lower Ordovician metasediments of the Zamora province are described in this paper. Futhermore a paleogeography reconstruction of these rocks is maked. It's important the presence of Girvanella Problematica and Redonia in the ironstones as soon as numerous fossil traces: Daedalus halli and Cruclana which are associated to the Lower Ordovician metasediments (infra-Arenig and Arenig). These relics determine as hallow marine environment in the formation of this materials. This environment is in te grated in a extensive platform which is situated in the N margin of the Condwana continentspaAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/FossilFossil tracesLower OrdovicianPaleogeographyjournal articleopen access