LITHOSTRATIFICATION

A 2-D geoelectrical resistivity survey was carried out on two different locations (hall 2 and hall 3) in University of Benin, Benin City, Edo State, Nigeria, for subsurface lithology. The Wenner array configuration and Pasi Earth resistivity meter was engaged for the acquisition of fields datasets. The data were subjected to an inversion using RES2DINV software for analysis and interpretation. The lateral spacing used was 160m and the total depth for the first and second locations were 136m and 64m respectively. The resistivity of the various surveys ranges from 57Ωm to 1261Ωm for survey line 1 and 1Ωm to 631Ωm for survey line 2. The geological interpretation of survey line 1 reveals the presence of possibly clayey sand and sand having resistivity values of 50Ωm - 500Ωm and 800Ωm - 1200Ωm respectively. Survey line 2 reveals the presence of possibly laterite soil, clay, alluvium soil having resistivity values of 10Ωm - 88Ωm, 50Ωm - 100Ωm, and 200Ωm - 800Ωm respectively. Results for this study shows that buildings can be erected in the survey line 1 which has large deposit of sand. For survey line 2, excavations and sand filling of the area should be done before erecting buildings to prevent building collapse because of the large deposit of clay