Larena, Z. Arenas, C. Baceta, J.I. Murelaga, X. Suarez-Hernando, O. Stratigraphy and sedimentology of distal-alluvial and lacustrine deposits of the western-central ebro basin (NE iberia) reflecting the onset of the middle miocene climatic optimum Geol. acta 10.1344/GeologicaActa2020.18.7 2020 2020