Geologica Acta is a peer-reviewed open-access scientific journal that covers research in the Earth sciences. It was established in 2003 as a successor to Acta Geológica Hispánica (1966-2002), a locally oriented journal published in Spanish. The journal is published by the University of Barcelona, the Instituto de Ciencias de la Tierra Jaume Almera (CSIC), the Institut de Diagnosi Ambiental i Estudis de l'Aigua (CSIC), and the Autonomous University of Barcelona. ()