Stable isotopic composition of dinosaur eggshells and pedogenic carbonates in the upper cretaceous seonso formation, South Korea: Paleoenvironmental and diagenetic implications

The narrow range in the δ13C values of the eggshells (−7.04 to −8.69 ‰) reflect a uniform source for carbon; mostly representing fresh water charged with CO2 from hydrothermal sources as dissolved carbon.