Lithofacies association | Lithology | Sedimentary structures | Palynomorphs | Inferred environments |
I | Multiple intra-formational conglomerate beds with thicknesses between 60 and 80 cm and inter-bedded with conglomeratic sandstones and shale. Comprises of well to sub-rounded predominantly quartz pebbles, well to poorly sorted and clasts to matrix supported. | Parallel aligned prismatic pebbles, slightly imbricated and scoured bottoms. | Practically no palynomorphs (PNP) | Fluvial channel or point bars. |
II | Conglomeratic sandstone beds which frequently overlies the conglomerate beds. These beds are poorly sorted, matrix supported with both the pebbles and sand sized particles well to sub-rounded, predominantly quartz and feldspars. | No imbrications but parallel aligned prismatic pebbles, planar and trough cross-stratification. Fining upward grain sizes. | No palynomorphs | Fluvial channel or point bars |
III | Massive sandstone beds of variable thicknesses but up to 5 m. Fine-coarse grained, poorly sorted, sub-rounded quartz, feldspars and tiny but visible mica flakes. | Structureless | No Palynomorphs | Lake shore characterized by very weak waves. |
IV | Heterolithic sequence of interbedded highly indurated shale, limestone, fine-grained sandstone. The beds vary in thickness between 1.5 and 60 cm and present a rhythmic or cyclic sedimentation. | Thinly bedded to moderately massive beds dipping between 10˚ - 15˚NW. | Mixed palynomorph assemblages,-Land derived pollen grains, pteridophytic spores, archritarch, algal remains and dinoflagellate cysts. | Lacustrine environment with a proximal sea water. |
V | Massive to fissile, black organic rich, ligniticshales, sometime occurring and intercalated with calcareous sediments (Marlstone). | Sometimes highly fissile, Unidentified moulds. | Mixed palynomorph assemblages,-Land derived pollen grains, pteridophytic spores, archritarch, algal remains and very visible plant debris. | Oxygen starved deep bottom lake environment. |