In the area of the expositional forest-steppe in the Transylvanian Basin there are many larger or smaller islands of fossil Clinostagnic Phaeozems and Chernozems covered by Luvisols. This work aims at testing the potential of state of the art optically stimulated luminescence dating methods for obtaining an absolute chronology for these soil covers. As novel techniques are used, they are being described in detail. The ages obtained (~ 10 ka for the Phaeozems, respectively ~ 4 ka for the Luvisols) can be regarded as evidence that the chernozem soil cover was a stable feature before the ascent of human activities and that these soils suffered a degradation in the a late Holocene that reflects a climatic transition. Thus, this is at least partial evidence that these paleo-pedological structures from Transylvania consisting of a fossil mollic horizon of a Phaeozem covered by an albic horizon of an actual Luvisol can be considered a marker resuming the climatic change associated with the Subboreal-Subatlantic transition which began around 4ka BP.