Resultados preliminares del estudio paleosísmico mediante trincheras de la falla de Alhama de Murcia (Cordillera Bética)

Abstract

Trenching on Alhama de Murcia fault trace has been done in order to identify and quantify paleoseismic deformation on a 100 km long active oblique-slip fault. The first results from one of the trenches confirm the existence of coseism ic reverse fault deformation affecting quaternary alluvial fan deposits. The sedimentary evolution observed on trench shows a temporary blocking of Colmenar creek flow (in the foot wall of the Alhama de Murcia fault), due to uplifting of the hanging wall during coseismic reactivation. An available age of 3010 ± 90 yr post-dated that process.