Rapid Uplift of the Altiplano Revealed Through <sup>13</sup> C- <sup>18</sup> O Bonds in Paleosol Carbonates
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- Prosenjit Ghosh
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- Carmala N. Garzione
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
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- John M. Eiler
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA.
書誌事項
- 公開日
- 2006-01-27
- DOI
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- 10.1126/science.1119365
- 公開者
- American Association for the Advancement of Science (AAAS)
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説明
<jats:p> 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 <jats:sup>13</jats:sup> C- <jats:sup>18</jats:sup> 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 ± 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. </jats:p>
収録刊行物
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- Science
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Science 311 (5760), 511-515, 2006-01-27
American Association for the Advancement of Science (AAAS)
