Foraminiferal Biostratigraphy of Shales in Lokpaukwu Area

The biostratigraphy of stratigraphic sections exposed at Ihube and Leru long the Port Harcourt – Enugu Expressway was studied. The lithologic units of the succession are basically shales and sandstone depicting a marine depositional environment. The method of study involved the collection of sample to evaluate the final subsequent laboratory analysis of collected sample to evaluate final observable features. A total of Twelve (12) samples were collected from the outcrops in the study area. From the laboratory analysis carried out, a lithological description of all samples collected depth by depth was made with 2.0m HCI to check the presence or absence of calcareous forms. The result shows more shale than sand in the sediment showing a marine origin of deposition. Also from Micropaleontological analysis made, benthic arenaceous foraminifera assemblages were recovered. They include; Ammobaculties amabensis, Haphragmoides saheliense, textularia gilbedina, Ammobaculities sp and Haplophragmoldes sp. They are the benthic and their ages span from Campanian -Maastrichtian which coincides with the marine incursion in the Anambra Basin. These forms suggest an inner neritic environment of deposition.