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Published online by Cambridge University Press: 29 April 2008
F. J. Gracia, F. Gutiérrez & M. Gutiérrez comment: In a recent paper, Rubio & Simón (2007) propose that the origin of the Jiloca Depression (Iberian Range, NE Spain) is primarily due to extensional neotectonics and estimate a Plio-Quaternary vertical offset of 350–400 m on the basin-bounding master fault. However, these authors omit crucial evidence presented in previous papers that contradict their model and derive interpretations from ambiguous or erroneous data. This discussion presents the main objections to their model and supports the mixed erosional (karstic) and tectonic origin proposed in previous research articles.