O Bonds in Paleosol Carbonates 18 C - 13 Rapid Uplift of the Altiplano Revealed Through
نویسنده
چکیده
www.sciencemag.org (this information is current as of July 24, 2008 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/311/5760/511 version of this article at: including high-resolution figures, can be found in the online Updated information and services, found at: can be related to this article A list of selected additional articles on the Science Web sites http://www.sciencemag.org/cgi/content/full/311/5760/511#related-content http://www.sciencemag.org/cgi/content/full/311/5760/511#otherarticles , 11 of which can be accessed for free: cites 28 articles This article 34 article(s) on the ISI Web of Science. cited by This article has been http://www.sciencemag.org/cgi/content/full/311/5760/511#otherarticles 15 articles hosted by HighWire Press; see: cited by This article has been http://www.sciencemag.org/cgi/collection/geochem_phys Geochemistry, Geophysics : subject collections This article appears in the following http://www.sciencemag.org/about/permissions.dtl in whole or in part can be found at: this article permission to reproduce of this article or about obtaining reprints Information about obtaining
منابع مشابه
Rapid uplift of the Altiplano revealed through 13C-18O bonds in paleosol carbonates.
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 13C-18O bonds in soil carbonates. We use this appro...
متن کاملRapid late Miocene rise of the Bolivian Altiplano: Evidence for removal of mantle lithosphere
The oxygen isotopic compositions of carbonates deposited in the northern Altiplano demonstrate a rapid change in late Miocene time, which we attribute to an increase in elevation. Rainfall samples over an elevation transect adjacent to the Altiplano of northern Bolivia display a systematic decrease in mean annual yO values and define a local yO vs. altitude gradient [R. Gonfiantini, M.-A. Roche...
متن کاملHigh-temperature environments of human evolution in East Africa based on bond ordering in paleosol carbonates.
Many important hominid-bearing fossil localities in East Africa are in regions that are extremely hot and dry. Although humans are well adapted to such conditions, it has been inferred that East African environments were cooler or more wooded during the Pliocene and Pleistocene when this region was a central stage of human evolution. Here we show that the Turkana Basin, Kenya--today one of the ...
متن کاملNew Stable Isotope Record of Paleoecological Change in the Late Neogene of the Western Great Plains from Enamel in Large Mammals
An expansion of C 4 grasslands occurred between 6 and 8 million years ago in the Great Plains of North America, as evidenced by a marked shift to more 13 C-enriched carbon isotope compositions from large fossil mammal tooth enamel and paleosol carbonates. Prior to this expansion, habitats were comprised of exclusively C 3 vegetation. To explore this problem I present a compilation of bulk stabl...
متن کاملStable isotopes of pedogenic carbonates as indicators of paleoecology in the Plio-Pleistocene (upper Bed I), western margin of the Olduvai Basin, Tanzania.
Paleosol carbonates from trenches excavated as part of a landscape-scale project in Bed I of Olduvai Gorge, Tanzania, were analyzed for stable carbon and oxygen isotopic composition. The approximately 60,000-year interval ( approximately 1.845-1.785 Ma) above Tuff IB records evidence for lake and fluvial sequences, volcanic eruptions, eolian and pedogenic processes, and the development of a flu...
متن کامل