A. V. Chistyakova
Lomonosov Moscow State University; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Russian Federation

1 Leninskie Gory, Moscow 119991: 
10-1 Bolshaya Gruzinskaya St, Moscow 123242

R. V. Veselovskiy
Lomonosov Moscow State University; Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Russian Federation

1 Leninskie Gory, Moscow 119991: 
10-1 Bolshaya Gruzinskaya St, Moscow 123242

V. K. Golubev
Borissiak Paleontological Institute, Russian Academy of Sciences; Kazan Federal University
Russian Federation

123 Profsoyuznaya St, Moscow 117647; 
18 Kremlyovskaya St, Kazan 420008

E. V. Adamskaya
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Russian Federation

2 Makarova Emb, Saint Petersburg 199034

V. P. Kovach
Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences
Russian Federation

2 Makarova Emb, Saint Petersburg 199034