fig04.htm

Figure 4. Schematic geological map for the area of the middle course of the Biryusa River (compiled using the data of G. A. Belozerov and T. V. Gorbovskaya).
(1) Early Proterozoic granitoids of the Sayan Complex; (2-3) Late Riphean Karagas Group: (2) Shangulezh and Tagul Formations (bottom of the sequence); (3) Uda Formation; (4) Nersa dolerite complex (sills and dikes) of Early Riphean age; (5) fault.


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