PUSTOVALOV 306 



and L. N. Sheronov . The zirconium citrate complex. Zhur. 

 Neorg. Khim. 4, 367-71 (1959). C. A. 53, 16790g (1959). 

 and E. N. Tekster. Determination of the instability constants 

 for the uranyl oxalate complexes by the equilibrium dis- 

 placement method. Zhur. Neorg. Khim. 4, 2248-54 (1959). 

 C. A. 54, 14884g (1960). 



and M. Morachevskaya. Determination of iodides in pres- 

 ence of bromides and chlorides with the aid of radioactive 

 iodine. Zavodskaya Lab. 26, 269-71 (1960). C A. 54, 

 13952d (1960). 



and E. N. Tekster, L. I. Vinogradova. Determination of the 

 instability constants of the complex oxalates of magnesium 

 and uranyl with an oxalate silver electrode. Zhur. Neorg. 

 Khim. 4, 764-8 (1959). C A. 54, 8232f (1960). 

 Office: Department of General Chemistry 



Novosibirsk State University 

 Novosibirsk, Siberia 



PUSTOVALOV, LEONID VASIL^EVICH (Petrographer) 



L. V. Pustovalov was born August 8, 1902. He graduated 

 from Moscow University in 1925. In 1934, he was professor at 

 the Moscow Oil Institute and from 1943-1955 he was chairman 

 of the Department of Petrography of Sedimentary Rock of the 

 Institute of Geological Sciences at the U.S.S.R. Academy of 

 Sciences. He was also chairman of the Council on the Study of 

 Productive Forces of the U.S.S.R. Academy of Sciences in 

 1953. He was elected, in 1953, to the U.S.S.R. Academy of 

 Sciences as a Corresponding Member. Since 1944, he has been 

 a member of the Communist Party. He was awarded Stalin 

 Prizes in 1940 and 1941, and in July 1962 the Order of the Red 

 Banner of Labor. 



Pustovalov' s main works deal with petrography and geo- 

 chemistry of sedimentary rock. In 1933 he studied the problem 

 of the geochemical species in sedimentary rock, having par- 

 ticular significance in understanding sedimentation processes. 

 In particular, he demonstrated the differentiation in substances 

 from a sedimentation zone, the periodicity in the formation of 

 sedimentary rock and commercial minerals of sedimentary 

 derivation. While studying conditions in the formation of oil 

 producing rock masses of Azerbaijan, Pustovalov established a 

 link between the mechanical, the mineralogical and the chemi- 

 cal composition of sedimentary rock (1946). In later years he 

 has been occupied with the study of secondary changes of 

 ancient sediments. 



