RT Conference Proceedings T1 La Sierra Alhamilla (Beticas orientales), una ventana extensional abierta en el basamento de la cuenca Miocena de Alboran T1 The Sierra Alhamilla (Eastern Betics), an extensional tectonic window opened in the basement of the Miocene Alboran basin A1 Martínez Martínez, Javier AB The Alpujarride/Nevado-Filabride boundary exposed in the Sierra Alhamilla is a detachment fault belonging to the Fiiabres Extensional System (FES), a pronouncedly asymmetric system with a westsouthwestward transport direction. It was active during the Serravallian and folded during the Upper Tortonian-Messinian times. The FES geometry suggests a complex extensional history with more than one episode of norm al faulting. There are listric fans coalescing to a floor fault at shallow le vels and extensional duplexes at the deeper ones. The duplexes formed by migrating footwall faults, horses being bounded by out-of-sequence faults and inactive tilted faults belonging to the overlying listric fans PB Sociedad Geológica de España YR 1994 FD 1994 LK http://hdl.handle.net/10272/13883 UL http://hdl.handle.net/10272/13883 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026