doi:10.1002/gj.2884engCalvín, P.Santolaria, P.Casas, A.M.Pueyo, E.L.Detachment fold vs. ramp anticline: A gravity survey in the southern Pyrenean front (External Sierras)ART-2017-99815The Santo Domingo Anticline (External Sierras, Southern Pyrenees), which separates the Jaca piggyback basin from the Ebro foreland basin, is a key structure of the Pyrenees. Its geometry has been interpreted both as a detachment fold and as a hangingwall anticline associated with an underlying thrust. In this paper, we present the results from a gravity survey and 2.5D gravity modelling carried out around the Santo Domingo Anticline. Density measurements indicate a sharp density contrast between the Triassic evaporites-mudstones in the core of the anticline and the sedimentary sequence (limestones and sandstones) at its limbs. Gravity anomalies together with 2.5D gravity models allow to discern the along-strike structural changes. From east to west, we document a change from the ramp-associated fold to the detachment anticline. The capabilities and limitations of the gravimetric method for the determination of fold geometry are also discussed.2017http://zaguan.unizar.es/record/16910910.1002/gj.2884http://zaguan.unizar.es/record/169109oai:zaguan.unizar.es:169109info:eu-repo/grantAgreement/ES/MINECO/CGL2014-54118-C2GEOLOGICAL JOURNAL 53, 1 (2017), 178-190All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess