S. Echeverri, A. Cardona, A. Pardo-Trujillo, C. Borrero, S. Rosero, and S. López, “Correlation and Ar-Ar geochronology of the Cretaceous basement and the upper Eocene - Miocene (lower Aquitanian) sedimentary filling of the Tumaco forearc basin, southwest Colombia”, revmexcg, vol. 32, no. 2, pp. 179–189, Jan. 2018.