MAGNETIC METHODS 



227 



a I 



O I ZKms. 



Fig. 110. — Magnetic contours over irregularly-shaped laccolitliic mass, (a) observed 

 and (6) calculated anomalies over intrusive mass of predicted shape shown in (c). (Mal- 

 amphy, A.I.M.E. Geophysical Prospecting, Tech. Pub. 696.) 



