Geomorphic signature of segmented relief rejuvenation in the Sierra Morena, Betic forebulge, Spain

Abstract. The foreland relief of alpine orogenic belts is often rejuvenated due to the intraplate propagation deformation. Thus, in these long-lived areas, localisation rejuvenation may be largely controlled by reactivation previous mechanical discontinuities. In this regard, we explored relationship between pattern and distribution, geometry, kinematics faults a wide segment Betic (Sierra Morena, southern Spain). Specifically, focused on forebulge, WSW–ENE flexural that formed, paired basin, response load. For purpose, applied both qualitative quantitative geomorphological tools, including geomorphic indices knickpoint modelling χ space. We found responds large-scale uplift coupled with tectonic activity two groups show evidence reactivation, namely overall contributing regional NNW–SSE segmentation vertical extrusion NW–SE reverse associated an outstanding topographic west study area. addition, our suggests related southernmost Sierra Morena mountain front have been particularly active recent times, although their span relative they accommodate differ along Morena/foreland basin limit. also significant reorganisation analysed drainage basins. strain partitioning accommodated structures involved transpressional deformation reported from external fold thrust belt.