¹⁸O and D
All ¹⁸O (except carbonates) and D values are reported relative to Vienna SMOW (Standard Mean Ocean Water). ¹⁸O of carbonates are reported relative to PDB (Cretaceous belemnite from the PeeDee formation).

The conversion of PDB ¹⁸O to SMOW ¹⁸O is:

¹⁸O SMOW = 1.03086*¹⁸O PDB + 30.86

^13C
All ^13C values are reported relative to PDB (Cretaceous belemnite from the PeeDee formation).

¹⁵N
^15N values are reported relative to atmospheric nitrogen.

^34S
34S values are reported relative to troilite of the Canyon Diablo iron meteorite.