366 



EXPLORATION GEOPHYSICS 



not far to the east and the northeast, and of the buried southwest slope 

 of the Arbuckle mass. 



The analysis of the torsion balance data consisted in the calculation 

 of the difference in the value of gravity between each pair of adjacent 

 stations and the least square adjustment of these values for the 68 stations 



Fig. 215. — Torsion balance survey of the Fox Hills 

 Oil Fields, Oklahoma, showing gradient values. Re- 

 gional gravity contours (isogams) based on a pendulum 

 gravity station are given. (After Barton.) 



Fig. 216. — Anomalous isogams over the Fox Hills Oil Fields, 

 Oklahoma, after correcting for regional gradient. Generalized sub- 

 surface contours shown by broken lines. (After Barton.) 



