THE RED HILLS MINE PALYNOFLORA: A DIVERSE SWAMP ASSEMBLAGE FROM THE LATE PALEOCENE OF MISSISSIPPI, U.S.A.

摘要: Lignites from the Red Hills Mine in Mississippi, U.S.A. contain pollen and spores derived paratropical swamp vegetation on U.S. Gulf Coast during Late Paleocene. Most previous studies of sporomorph record have been limited to a restricted taxonomic group, or merely those taxa that are relevant biostratigraphy, meaning true diversity may be higher than previously appreciated. Eight samples were collected for palynological analysis Lignite Ackerman, Mississippi. All observed counting (a minimum 300 grains per sample) included sample count. Rarefaction, relative abundance distributions, non-metric multidimensional scaling used analyze floral composition, richness, evenness. The lignite heterogeneous terms composition abundances, indicating patchiness communities. Clay horizons representing temporary marine incursions significantly proportions bisaccate pollen, which originated considerable distance inland swamps. These therefore represent much larger source area (regional sub-continental), compared local signal contained samples. Richness assemblage is has recorded Paleocene eastern Coast. This, combined with recognition 23 undescribed taxa, suggests detailed reappraisal needed improve understanding evolution North American type.