We investigate how oxygen isotopes in equid teeth can be used as a record of seasonality.
First, we use in situ laser ablation and conventional microsampling techniques to
understand time-averaging of environmental signals in intra-tooth isotope profiles in modern
feral horse teeth (n= 5) from Mongolia, where there is a large seasonal gradient in the
oxygen isotopic composition of precipitation. We demonstrate that laser ablation can be
used to sample inner, middle, and outer enamel layers in large mammalian herbivore teeth …