Holocene oxygen isotope data from Lake Sidi Ali, Middle Atlas, Morocco

The data set represents an improved Holocene δ18O record from Lake Sidi Ali Middle Atlas, Morocco). We add 82 new δ18O data of adult ostracod shell material from the closely related species Fabaeformiscandona sp. and Candona sp. to improve the chronological resolution of the previous oxygen isotope record (Zielhofer et al., 2017).