FIGURE 1. 1 in First bird footprints from the lower Miocene Lerín Formation, Ebro Basin, Spain

FIGURE 1. 1, Locality map for the Aguilares tracksite and the other tracksites with vertebrate footprints in the western area of the Ebro Basin: 1, Javier-Liédena; 2, Olejua; 3, Olkotz-Etaio; 4, Alcanadre; 5, Desojo-Los Arcos; 6, Cenicero; 7, Logroño; 8, Aguilares. 2, Composite lithostratigraphic and magnetostratigraphic logs of the Cabezo Marijuán stratigraphic section (see Larrasoaña et al., 2006) and their correlation to the ATNTS2004 of Lourens et al. (2004). The position of Aguilares tracksite is described in this study; for the other fossil localities see Murelaga (2000) and see Ruiz-Sánchez et al. (2012).