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Shahar, J. 2008. Note on stratigraphic relations of Zefa, Hazeva, and Hufeira formations in southern Israel. Isr. J. Earth Sci. 57: 33-44.Three cycles of erosion generate the indicative round flint pebbles in the Negev during uplift phases of Oligocene-Miocene times. Products of the first cycle (Zefa Formation, Oligocene) were found in Ef'e syncline and probably also along Abu-Treife fault. Products of the second cycle (Hazeva's Rotem Member, Middle Miocene) are known all over the Negev as layers of marl, silt, sand, and round pebbles attaining thicknesses of a few tens of meters. The third cycle (Hufeira Formation, Late Miocene) is restricted to the tectonically sinking Arava and related faults, attaining thicknesses of up to 2 km, deposited in an arid climate, distinctly different from the more humid Rotem cycle. Among the three cycles, only the Rotem cycle belongs to Hazeva Formation. The two others predate and postdate Hazeva Formation, respectively. This threefold process may resolve the ambiguity regarding "Zefa" and "Rotem" stratigraphic units to one single cycle.