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Rapid Uplift of the Altiplano Revealed through$^{13}C-^{18}O$Bonds in Paleosol Carbonates
Ist Teil von
Science (American Association for the Advancement of Science), 2006-01, Vol.311 (5760), p.511-515
Ort / Verlag
American Association for the Advancement of Science
Erscheinungsjahr
2006
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
The elevation of Earth's surface is among the most difficult environmental variables to reconstruct from the geological record. Here we describe an approach to paleoaltimetry based on independent and simultaneous determinations of soil temperatures and the oxygen isotope compositions of soil waters, constrained by measurements of abundances of$^{13}C-^{18}O$bonds in soil carbonates. We use this approach to show that the Altiplano plateau in the Bolivian Andes rose at an average rate of$1.03 \pm 0.12$millimeters per year between ~10.3 and ~6.7 million years ago. This rate is consistent with the removal of dense lower crust and/or lithospheric mantle as the cause of elevation gain.