f Detecting the Sink-holes by Microgravity Data

The relative negative anomalies of microgravity data are detected in an industrial site. These negative anomalies are generated by the low density zones and or probable cavities in the limestone base rock that are overlaied by quaternary deposits. These zone are partly examinated by drilling several bore holes. The negative anomalies projected on the Google map of the area are shown in Fig. (1).