80' 



60' 







+ -@ 



T^ 



r-0 



+ .„_g 



j^q 



30' 





^ 



A 



30' 



60' 



FIGURE 16. CONTOURS OF POINT-MASS ANOMALY DATA AFTER APPLICATION 

 OF HIGH-PASS FILTER. CONTOUR INTERVAL IS 0.1 mgls. 



35 



