fig08.htm

Figure 8. Paleogeographic scheme showing the foreland basin of the southwestern Siberian craton during the accretionary phase of its evolution (Early Vendian, early Aleshino-Betenchinsky time). Initiation of grabens, precursors to foredeeps; sea-level lowstand and ice cap initiation.
Symbols to Figures 8-12: 1 - basement (socle) of the Siberian craton and of continental terranes accreted onto it in the Vendian; 2 - outline of nascent molasse grabens; 3 - braided fluvial plain; 4 - anastomosing fluvial plain; 5 - glaciofluvial debris cones; 6 - shallow marine (shelf) sedimentary systems; 7 - shallow marine carbonate systems of deglaciation-driven marine transgressions; 8 - coastal and strand plain composed of sand deltas; 9 - inferred ice cap boundary; 10 - stream directions, as inferred from sole marks, plunge of troughs, and cross-stratified series in channel deposits of fluvial molasse assemblages; 11 - directions of clastic fluxes (principal); 12 - same, subsidiary; 13 - marine transgression directions; 14 - boundary of sedimentary cover of the Siberian craton; 15 - cratonic boundary.


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