| This study uses stable carbon and oxygen isotopes to reconstruct changes in ecology, climate, and paleodiet of mammals during the Cenozic on the North America continent.;Stable isotopes of paleosol carbonates from the St. David Formation in Arizona indicate a major change in ;Diagenetic modeling of stable isotopes of calcified tissues in postmortem environment and a case study of fossils from Badlands National Park, South Dakota demonstrate that diagenesis of biogenic carbonate in tooth enamel hydroxyapatite over time is very limited and fossil tooth enamel of Oligocene mammals preserved their paleodietary signatures. ;Carbon isotopic compositions of tooth enamel of fossil horses from North America indicate that savanna grasslands, presumably dominated by C;... |
