Ordovician VS. "Cambrian" ichnofossils in the Armorican quartzite of central Portugal

Sá, Artur AbreuGutiérrez-Marco, Juan CarlosPiçarra, José ManuelGarcía-Bellido, Diego C.Vaz, NunoAceñolaza, Guillermo Florencio2014-08-112014-08-112011Sá, A. A... [et al.] - Ordovician VS. "Cambrian" ichnofossils in the Armorican quartzite of central Portugal. In: Cuadernos del Museo Geominero, Instituto Geológico y Minero de España, 14 (2011), p. 483-492978-84-7840-857-3http://hdl.handle.net/10400.9/2515engIcnofósseisCruzianasQuartzitosOrdovícicoPortugal (Centro)Ordovician VS. "Cambrian" ichnofossils in the Armorican quartzite of central Portugalperiodical