Comment on "Rapid uplift of the Altiplano revealed through 13C-18O bonds in paleosol carbonates".
Based on stable isotope measurements, Ghosh et al. (Reports, 27 January 2006, p. 511) concluded that the Bolivian Altiplano uplifted 3 to 4 kilometers between approximately 10.3 and approximately 6.7 million years ago as a result of gravitational loss of dense lithosphere. This result stands at odds with current geological knowledge of the Central Andes, and we propose a test for the reliability of the paleoaltimetry method.
Sempere
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Institut de Recherche pour le Développement and Laboratoire "Mécanismes et Transferts en Géologie," Observatoire Midi-Pyrénées, Université Paul Sabatier, 31400 Toulouse, France. sempere@lmtg.obs-mip.fr
Hartley
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Roperch
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