ABSTRACT:

The interpretation of five restivity curves over Nanka town within geologic terrain often referred to as Nankaformation in Anambra Basin, south-eastern Nigeria indicates that the area has a great grouridwater potential. A correlation of the curves with the lilhologic log from a nearby borehole suggests that the major lithologic units penetrated by the sounding curves are Laterite, Clay Sandstone and clay. The sandstone unit which is the aquiferous zone has a resistivity range of between 500 ohm.m and 960ohm.m and thickness in excess of 200m. The depth to the water table is at least 1 00m .