the eastern Jura Mountains consist of the Jura fold-thrust belt and the autochthonous tabular Jura and Vesoul-Montbéliard Plateau. they are drained by the river rhine, which flows into the North sea, and the river Doubs, which flows into the Mediterranean. the internal drainage systems of the Jura fold-thrust belt consist of rivers flowing in synclinal valleys that are linked by river segments cutting orthogonally through anticlines. the latter appear to employ parts of the antecedent Jura Nagelfluh drainage system that had developed in response to Late burdigalian uplift of the Vosgesback Forest Arch, prior to Late Miocene-Pliocene deformation of the Jura fold-thrust belt.the following stages are recognized in the evolution of the Jura Mountain drainage systems: 1) middle to late tortonian (10-7.2 Ma) folding-related overpowering and partial reversal of the south-directed Jura Nagelfluh drainage system, 2) Messinian to early Pliocene (7.2-4.2 Ma) Aare-Danube and protoDoubs stage, 3) early to middle Pliocene (4.2-2.9 Ma) Aare-Doubs stage, 4) late Pliocene to early Quaternary (2.9-1.7 Ma) Aare-rhine and Doubs stage and 5) Quaternary (1.7-0 Ma) Alpine-rhine and Doubs stage.Development of the thin-skinned Jura fold-thrust belt controlled the first three stages of this drainage system evolution, whilst the last two stages were essentially governed by the subsidence of the Upper rhine Graben, which resumed during the late Pliocene. Late Pliocene and Quaternary deep incision of the Aare-rhine/Alpine-rhine and its tributaries in the Jura Mountains and black Forest is mainly attributed to lowering of the erosional base level in the continuously subsiding Upper rhine Graben. Incision of the Doubs and Dessoubre canyons reflects uplift of the Franches-Montagnes and Franche-comté in response to thick-skinned deformation of the Jura fold-thrust belt, which had commenced around 3 Ma.Geodetic data indicate that uplift of the Jura Mountains, relative to the tabular Jura, presently continues at very low strain rates whilst the Upper rhine Graben subsides very slowly and the black Forest is relatively stable.
Introductionthe Jura fold-thrust belt (JFtb), forming the core of the Jura Mountains, is the youngest and most external element of the central Alpine orogenic system. It has accounted for up to 30 km of essentially thin-skinned shortening since late Miocene times (Laubscher 1961(Laubscher , 1992Philippe et al. 1996;Affolter & Gratier 2004) and is still seismotectonically active (becker 2000;Lacombe & Mouthereau 2002;Edel et al. 2006). the JFtb is flanked to the sE by the flexural swiss Molasse foreland basin of the Alps whilst its most external elements encroach on the bresse and Upper rhine grabens ( Fig. 1; chauve et al. 1980;Dèzes et al. 2004).Evolution of the JFtb combined with the development of the Upper rhine Graben (UrG) and the bresse Graben, exerted strong control on the location of the repeatedly shifting watersheds between the rivers Danube, Doubs and rhine, which flow into the black sea, the Mediterran...