Stable carbon and oxygen isotope compositions of Jurassic aptychi from the Mecsek Mts., southern Hungary

Stable carbon and oxygen isotope compositions (δ13C and δ18O values, respectively, in ‰ relative to V-PDB) of samples OxAM-1064 (least altered part of the laminated layer in the sample) and H1. The samples are Jurassic aptychi from the Mecsek Mts., southern Hungary. See Bujtor and Albrecht (2021, DOI: 10.7306/VJ.19.3), and Demény et al. (2025, Communications Earth and Environment, under revision).