Neogene-Quaternary coastal and offshore sedimentation in north central Chile: Record of sea-level changes and implications for Andean tectonism

A comparison of the recorded sea-level changes with global sea-level curves provides a reconstruction of local tectonic uplift and downwarp events during the Neogene-Quaternary. The migration of the Juan Fernández Ridge underneath this part of the Chilean flat-slab sector caused a relative uplift of 60 m, followed by subsidence of 125 m in its wake. The generalized tectonic rate of change varied from 0.02 to 0.08 mm/yr.