Fluvial inverse modeling for inferring the timing of Quaternary uplift in the Simbruini range

The timing of Quaternary uplift evolution of the Simbruinirange (Central Apennines, Italy) is poorly known due tothe lack of reliable chronological constraints of the post-orogeniccontinental clastic units, deposited after theupper Messinian thrust-topfacies, and tectonic events. Inthis regard, we identified the main geomorphic markers,including several levels of continental units, whose plano-altimetricprojection along the river longitudinal profile hasbeen correlated with the main non-lithologicalknickpoints.Furthermore, we inferred the uplift history of the range byapplying the inverse modeling of the river longitudinal profiles.Assuming a block uplift model, the drainage networkcutting the Simbruini range recorded 2.4 ± 0.5 Ma of tectonichistory, characterized by variable base-levelfall rates(corresponding to variable uplift rates).