282 



GRAVITATIONAL METHODS 



[Chap. 7 



tooo 



2000 



Fig. 7-112. Sections of Hoskins Mound salt 

 dome, showing comparison of torsion balance 

 predictions and results of drilling (after Bar- 

 ton). 



torsion balance work on an- 

 ticlinal structures has been 

 more extensive than the pub- 

 lished accounts would indicate. 

 In 1919 and 1920 R. Schumann 

 conducted torsion balance 

 measurements in the Vienna 

 Basin to determine potential 

 oil structure in the Sarmatian 

 formation and to trace the 

 Leopoldsdorf fault. "^ A por- 

 tion of the torsion balance 

 surveys made on Russian oil 

 structures has been published 

 by Numerov; gravity anom- 

 alies in the Grozny oil field 

 (Caucasian fold zone) are 

 shown on the resistivity map 

 of Fig. 10-67. The Grozny 

 and Terek anticlines are in- 

 dicated by gravity maxima. 

 Results for the Rumanian 

 fields have been discussed 





Nx 



^^ 



/ ^ y «- ^ 



I W^i [I 



\.v-. 



.S0£ 



\^^-^ 



as 1.0 



MILES 



IS 



Fig. 7-113. Shepards-Mott dome, reflection seismic and torsion balance survey (after 



Clark and Eby). 



"" R. Schumann, Montanistische Rundschau, June 1, 1923. 

 "8 Op. cit., 271. 



