Chap. 7J 



GRAVITATIONAL METHODS 



277 



Institute of Rumania began a study of various salt domes and anticlines. 

 The Floresti salt dome^'^ was surveyed with various geophysical methods. 

 It was found to produce a negative magnetic anomaly of the order of 40 

 gammas and to show distinctly in cquiresistivity surveys. Fig. 7-110 

 represents the gradient and curvature values along a profile across the 

 dome which is of the mushroom type and is covered with only about 20 

 meters of terrace gravels of the Prahova River. Further studies of this 



A 







Seismos Company 



Fig. 7-107. Torsion balance results on (deep-seated) dome of Schneeheide, northern 

 Germany. (Compare with Fig. 7-50a). 



and adjacent domes and anticlines were made in subsequent years by the 

 Rumanian Geological Institute."^ Among those investigated were the 

 domes of Baicoi-Tintea and the anticlines of Bucovul, Filipesti, Novacesti, 

 and others between Ploesti and Targovi§te. 



The torsion balance was introduced in this country in September, 1922, 

 and used in an experimental survey of the Spindle Top salt dome in De- 

 cember, 1922. The Nash dome was the first to be discovered by the 



"^M. Ghitulesco. 2nd Congr. Internat. de Forage (Paris, 1929). 

 -" I. Gavat. Inst. Geol. Roumania Ann., 16, 683-706 (1934). 



