An interpretation of the structure of the vineyard region bordering the Jura mountains, France, based on surface observations and borings in the vicinity of Lons-le-Saunier. The apparently disorderly relief is controlled by a combination of deep and superficial dislocations. The essential structural element is a series of north-south-trending faults, produced by tension associated with subsidence in the Oligocene. A phase of compression starting at the end of the Miocene produced bedding-plane slips at various stratigraphic levels (locally accompanied by folding and buckling in the interior of the moving mass) and horizontal displacements.

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