THE GEOLOGY OF ANINGEJE AND ITS ENVIRONS AND HYDRODYNAMICS AND PHYSIOCHEMICAL PROPERTIES OF MEAN TIDES IN CALABAR RIVER, SOUTHEASTERN NIGERIA.

ABSTRACT This study presents a report on the geology of Western Aningeje and its environs, located in the southeastern part of Nigeria within the Oban Massif. The area is part of the Precambrian Basement Complex and is made up of both metamorphic and igneous rocks. The main rock types identified include muscovite-biotite gneiss, granite, granodiorite, olivine gabbro, and pyroxene-hornblende gabbro. These rocks were observed in stream channels, road cuts, and farmland clearings. Field mapping, petrographic studies, and structural analysis were used to understand the geological features of the area. Petrographic analysis revealed the mineral composition and textures of the rocks, helping in the classification and interpretation of their origin. Structural features such as joints, veins, and foliations were measured and recorded, showing a dominant northeast–southwest trend related to the Pan-African orogenic event. The study area also experiences intense chemical weathering due to its humid tropical climate, resulting in deep lateritic soils and significant erosion in exposed areas. Overall, the geology of the study area reflects a long and dynamic history involving deep crustal processes, magmatic intrusions, and tropical weathering, all of which have shaped the present-day landscape and rock characteristics.