Abstract
In the Lorraine-Champagne basin, the Carnian salt deposit (~ 150 m thick) presents numerous discontinuities located at the limit between successive ‘event sequences’. Each sequence begins with the flooding of the basin and a shallow sedimentation of claystones and halite beds (maximum of a few metres thick). A trend towards a subaerial environment announces the second phase marked by an emersion (tepees) and a long period of desiccation (giant polygonal fissures). The sediments (claystones and sulfates) laterally deposited in marginal flats show the same discontinuities. Similar features are known in the Permian, Triassic and Miocene evaporite basins of the U.S.A., West Europa and Morocco.
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