YANSHIN 430 



The organism and the environment. Articles on Paleoecolo- 

 gy of Invertebrates, 1913-1956. Moscow -Leningrad: 1956. 



Biography: 



A. Ryabinin . Nikolai Nikolaevich Yakovlev (On the 70th 

 Anniversary since the date of birth). Annual of the All- 

 Russia Paleontological Society, 12, 1936-1939, Moscow- 

 Leningrad, 1945 (contains bibliography of the works of 

 Yakovlev.) 



V. V. Menner . Nikolai Nikolaevich Yakovlev. Izvest. Akad. 

 Nauk S.S.S.R., Ser. Geol., 1951, #3. 



I. L Gorskii. N. N. Yakovlev (On the 70th Anniversary since 

 the date of birth). Annual of the Paleontological Society, 14, 

 1948-53, Moscow-Leningrad, 1953. 



V. P. Nekhoroshev. On the work of N. N. Yakovlev in the 

 field of geology. Annual of the Paleontologic Society, 14, 

 1948-53. 



Office: USSR Academy of Sciences 



Leninskii Prospekt, 14 

 Moscow, USSR 



Residence: ul. Marksa i Engelsa 16 

 Moscow, USSR 



Telephone: K5 12 19 



YANSHIN, ALEKSANDR LEONIDOVICH (Geologist) 



A. L. Yanshin was born March 28, 1911. In 1923 he gradu- 

 ated from Moscow Geological Survey Institute and had been 

 working since 1929 in the Mining-Geological Department at the 

 Scientific Institute for Fertilizers. From 1936 he worked at the 

 Geological Institute of the U.S.S.R. Academy of Sciences and in 

 1956 was made Chairman of the Department on Regional Tec- 

 tonics at this Institute. Yanshin was elected an Academician of 

 the U.S.S.R. Academy of Sciences in 1958. In 1953 he was 

 awarded the A. P. Karpinskii Prize for his work on "Geology of 

 the North." He was the recipient of three orders and also some 

 medals. 



Yanshin' s investigations are in tectonics, stratigraphy, lith- 

 ology, and hydrogeology primarily of the Western territory of 

 the Kazakh S.S.R., and of the Southern Urals. In the Southern 

 Urals, he located a wide development of continental Mesozoic 

 sediments and distinguished in them a series of formations. 

 He worked out the stratigraphy of Tertiary sedimentation of the 

 Aralo-Turgaisk depression, in connection with which he criti- 

 cally examined some general questions in paleogenic stratigra- 

 phy. In biostratigraphic examinations, he adhered to the idea of 



