Abstract
Freshwater limestones and the underlying Eocene clays and lignites were penetrated by a cored borehole drilled in the Bouxwiller area. Pollen analyses of the clays and lignites were carried out on 75 samples. The pollen diagram could be subdivided into 3 distinct vegetation periods : floral assemblage I occurs at the base of the lower sands at the Bathonian (Jurassic)/Eocene boundary, and floral assemblages II and III in the brown clays and lignites. The results indicate that the base of the Bouxwiller Formation belongs to the lower Lutetian and the lignite beds to the middle Lutetian. The floral assemblages are characterized by an abundance and variety of Pteridophyta, the progressive development of the Myricaceae and Juglandaceae, the disappearance of the Normapolles and the diversification of the whole flora. The flora clearly indicates the development of a freshwater lake phase which was followed by a swamp and bog phase, during which the climate was warm and humid.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
