Figure 6.1

Distribution of Middle and Upper Proterozoic strata in the Western Canada Sedimentary Basin (after Hoffman, 1989).

Figure 6.2

Generalized stratigraphy of the Middle Proterozoic Muskwa assemblage. Based on descriptions by Bell (1968). Symbols as in Figure 6.4.

Figure 6.3

Lithostratigraphic correlation chart for the Purcell Supergroup. Units are formations unless otherwise indicated. By convention, mc stands for middle carbonate.

Figure 6.4

Regional cross section for the Purcell Supergroup. Stratigraphic columns are based on section descriptions from the following sources: Moyie Lake - McMechan (1980), Höy (1984); Mount Baker, Steeples, Sand Creek - McMechan (1980); N.W. Galton Range - Leech (1958, 1960), Schofield (1914); North Kootenay Pass - Price (1965), Fermor and Price (1983); Cate Creek-St. Eloi Brook - Fermor and Price (1983); Sage Creek-Pacific Atlantic Flathead - Price (1962, 1964), Fermor and Price (1983); Shell Grouse - unpublished Shell Canada Ltd. well lithlog; East Waterton - Douglas (1952), Hill (1985).

Figure 6.5

Schematic stratigraphic cross section near 49°N across central and eastern exposures of the Purcell Supergroup, showing dominant environments of deposition.

Figure 6.6

Reference logs for the Purcell Supergroup. Lithology logs generalized from unpublished lithlogs provided by Shell Canada Limited. Vertical scale (1:6000) is condensed from Atlas standard for reference logs (1:3000).

Figure 6.7

Isopachs for three divisions of the Purcell Supergroup (after McMechan, 1981).

Figure 6.8

Correlation chart for Upper Proterozoic (Windermere Supergroup) and Lower Cambrian strata, based on same references as Figure 6.9, plus Rice (1941), Little (1960), Reesor (1958, 1973), and Kubli (1990). Nomenclature for Windermere Supergroup north of Jasper from McMechan (pers. comm ., 1991).

Figure 6.9a

Regional cross sections of Upper Proterozoic and Lower Cambrian strata. References include: Evenchick (1988); Young (1979); Carey and Simony (1985); Bond et al. (1985); Teitz and Mountjoy (1985); Steiner (1962); Arnott (1984); Magwood (1988); Palonen (1976); Devlin (1989); Devlin and Bond (1988); Hein (unpublished field notes); Wolberg (1986); Aitken (1969); Aitken (unpublished field notes); Lindsey and Gaylord (in press ); H<148>y (1980); McMechan (unpublished field notes); Charlesworth et al. (1967). Cross section A-A'.

Figure 6.9b

Cross section B-B'.

Figure 6.9c

Cross section C-C'.

Figure 6.9d

Cross section D-D'.