| Abstract: | The fossil plant distribution in the Carboniferous of Saarland indicates that the base of the Westphalian D is in the upper Luisenthal Formation. Two distinctive changes in the middle Westphalian D floras are noted in the Heiligenwald Formation, very similar to those reported in the Upper Pennant Measures of South-Wales. These changes in the floras, recognizable in two distantly separated coalfields, are made the basis of a threefold biozonation of the Westphalian D. This is the most detailed biostratigraphical resolution presently available for non-marine strata of this age. |
