International Field Workshop on 'The Triassic of eastern France'

Figure III.1: (A) E-W Muschelkalk section between Emberménil and Saint Just Sauvage: depositional sequence
geometries-relationship between time-lines and facies. (B) Wells location. After Bourquin et al., 1995,
modified.
In the western and northern part of the Paris Basin (Fig. III.2), we observed from subsurface data
(well-log and core) that the lower part of the Lettenkhole consists of mixed terrigenous-evaporite sediments
(playa floodplain and channel deposits) which thicken west of the Aire Fault (Fig. III.2a) and to the north
(Fig. III.2b) (Bourquin and Guillocheau, 1993, 1996). There is no evidence of incised valleys like those
described in the German Basin (‘Hauptsandstein’ Formation, Aigner and Bachmann, 1992). In the eastern
part, the evolution from the mfs to the ‘Calcaire à térébratule’ and to the flood plain deposits of the Middle
Lettenkohle attests a progradation phase that ends this cycle.
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