Stable isotopic studies of dinosaur eggshells from the Nanxiong Basin, South China

摘要

Stable carbon and oxygen isotopes have been observed in dinosaureggshell samples, identified as Macroolithus yaotunensis, collectedin two sections of the Nanxiong Basin, Guang- dong Province, SouthChina. Multiple positive δ~18O perturbations that occurred duringthe K/T transition of about 150 ka suggest that there may have beenat least three periods of the extreme dry climate with a mean annualair temperature over 27deg.C.