Abstract
In the Durance valley, high terrace levels are stepped below the young. Villafranchian surface and separated from the middle and low terraces by a step 80 m high. A paleomagnetic study was made of a key bed of freshwater silt on the high terrace, that contains archaic faunal and floral elements. The section contains two sedimentary cycles with opposite polarities, which are therefore placed on either side of the Brunhes-Matuyama boundary. By comparison with the northern European climato-stratigraphy, this sequence is correlated with the base of the Cromerian complex. Taking into account the morphological relations to the upland morainic system, this youngest high terrace is assigned a Günz age.
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