742 



EXPLORATION GEOPHYSICS 



Fig. 453. — Map showing structural divergence over a salt dome. (Courtesy Continental Oil Co.) 



On expanding the expressions within the parentheses on the right-hand side of tliis 

 equation and neglecting all terms after the second, the equation becomes 



Xi' 



{x2 — Xi) sin ^1 — V1T2 -~ ViT-i. — Yi J, rj. + ^ y, „ 



However, 



T2—Ti = ATi 



Also, it can be assumed without appreciable error that ViTi is equal to ViTi. Hence, 



ViATi X2 + X1 



2F^T^ 



(96) 



