International Field Workshop on 'The Triassic of eastern France'

Stop 3.5 - Helstroff (D19 road cutting): Uppermost Muschelkalk (‘Calcaire à cératites’
and dolomitized ‘Calcaire à térébratules’ Fms)
In this stop (see p. 7 for location), the upper part of the ‘Calcaires à cératites’ display a tempestite bed
overlain by small Placunopsis reefs (Fig. 35). The top of the outcrop shows the ‘Calcaire à térébratules’
Formation. This characterizes an evolution from upper offshore to shoreface environments. The 'Calcaire à
térébratules' is here pervasively dolomized and was thus included in the Lettenkohle on the "official"
geological map.
Figure 35: Outcrop of Helstroff and detailed view of the tempestite bed overlain by small Placunopsis reefs.
63