Sedimentological and Palyno-environmental appraisal of the late quaternary sediments, north-eastern Bornu Basin

The sediments consist predominantly of terrigenous and argillaceous mudstone with thin sandstone interbeds of point bar deposits of laterally migrating, moderate to high sinuosity river channels. The dominant sandstones are angular to subrounded, moderately poor sorted, fine modal mineralogically and texturally immature. The presence of Botryococcus braunii, freshwater algae, suggests a freshwater-lacustrine environment.