Oxygen isotopes vary with the water cycle, and sulfur with bedrock, so they're location proxies.

氧同位素会随着大气水循环而变化，硫同位素则根据地球岩床的不同而变化，通过它们我们就能确定地理位置。

youdao

Oxygen isotopes vary with the water cycle, and sulfur with bedrock, so they're location proxies.

氧同位素会随着大气水循环而变化，硫同位素则根据地球岩床的不同而变化，通过它们我们就能确定地理位置。

youdao