A new study in ScienceAdvances provides a timeline of rock layer formation that illuminates how a low valley rose into the vast Tibetan Plateau.
is independent of the isotopic compositions of water from which the carbonate grew, thus providing a temperature-dependent approach to determine the paleoelevation .
Clumped isotope analyses were conducted in the Department of the Geophysical Sciences at the University of Chicago and TPESER at ITPCAS. At the University of Chicago, the powdered carbonate samples were digested in ~9 ml of anhydrous phosphoric acid at 26°C overnight.
The precision of individual analysis was better than 0.013‰ and the analytical temperature uncertainties of temperatures were propagated through the calibration equation in . All the data are provided in tables S3 and S5.General circulation models have long been used to forecast weather and climate conditions with skill; however, their application to geological time periods is problematic due to uncertainties in model boundary conditions, some of which are well constrained and some are not .
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