International Field Workshop on 'The Triassic of eastern France'

Stop 4.2 - Volmunster-Lengelsheim: Lower Muschelkalk (‘Volmunster’ Formation,
Wellenkalk facies)
The Volmunster Formation (Figs. 40, 42) encompasses the major part of the Lower Muschelkalk
described in this area by Schumacher (1890), with the exception of the basal 'Grès coquillier' and the
'Dolomie à Myophoria orbularis' at the top (Fig. 43). In many places lithology evolves upwards, more or less
progressively, from clays and marls to dolostones and limestones. The particular structure of the 'Wellenkalk
facies' ('calcaire ondulé'), rather badly exposed here, results not only from depositional processes but also
from synsedimentary seismic activity (Schwarz, 1975).
Figure 42: Outcrop of Volmunster-Lengelsheim.
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