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Figure 3. Schematic lithologic and paleogeographic map of the Middle Russian paleorifts for the end of the Late Riphean and Early Vendian.
(1-4) facies: (1) fluvial deposits with glacial materials, (2) alluvial-proluvial red beds, (3) variegated sands and clays of shallow-sea and lake origin, (4) variegated sandy and clayey deposits of shallow-sea origin, (5) crystal-clastic tuff and occasional acid lava, (6) tuffite and pyroclastic sedimentary rocks, (7) undifferentiated deposits mapped from seismic profiling data, (8) areas of eroded or missing deposits of the Late Riphean and Lower Vendian top, (9) inferred volcanic centers, (10) inferred volcanic centers eroded in Late Vendian time, (11) direction of the removal of glacial clastic material, (12) direction of the removal of mature clastic deposits, such as the products of the erosion of the Riphean platform sediments, (13) active faults, (14) facies boundaries, (15) sites of drill holes and rock thickness in meters.


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