The Enigmatic Upper Ordovician of the Naturtejo UNESCO Global Geopark (Portugal) Sofia Pereira*, Jorge Colmenar, Cristiana J.P Esteves, Ícaro Dias Da Silva, Miguel Pires, Carlos Neto De Carvalho, 10.30486/gcr.2021.1913408.1053 XML Requires Subscription PDF Requires Subscription HTML downloads: 261 views: 123