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Twenty five vertical electrical sounding using the Schlumberger configuration with current electrode spacing of AB/2 = 100 m were carried out in Hussara, north-eastern, Nigeria. The field data were smoothened and interpreted using IX1D inversion [1] computer software. Secondary resistivity and secondary resistivity derived parameters were used to determine the potential aquifer horizon. Longitudinal conductance map of the third geoelectric layer indicates a higher conducting zone along the eastern part which may indicate possible concentration of weathered materials. Intermediate conductance striking from the north to the southeast may constitute a horizon with increased aquifer materials, while the lower conductivity values may indicate areas of fractured bedrock where the degree of decomposition of the rock fragments is minimal. The transverse resistance map of the same horizon revealed the contour values increasing from the west towards the east perhaps due to the increasing presence of fresh bedrock close to the surface

Application of Secondary Resistivity Parameters to Determine Potential Aquifer Horizon: Case Study of Basement Rocks of Hussara, Northeastern Nigeria