Abstract
The results of a palynological study in the Laudun, Upper Cenomanian (Gard, France) lignitic levels are compared to some sedimentological data to explain one regional continental facies. The predominance of kaolinite (up to 100%) in all the levels, its association with montmorillonite or regular interstratified minerals (montmorillonite-chlorite) and also the absence of illite illustrate the conditions of pedogenesis. Sudden interruptions in the sandstone sedimentation are related to an enormous increase of the pteridophytic element in the palynological diagram. The results show that a tropical warm and damp climate must be taken into account in order to define the more typical palynological spectra. The microfloristic evolution which is also mentioned allows correlations within the St-Paulet lignitic beds.
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