Figure 8.1

Index map showing the present distribution of Middle Cambrian to Lower Ordovician sediments, tectonic and topographic controls on sedimentation, post-sequence tectonic and topographic features, and the positions of regional cross sections and reference logs.

Figure 8.2

Correlation chart of Cambrian and Lower Ordovician formations from southern Alberta to the Northwest Territories and from the Main Ranges to the Williston Basin.

Figure 8.3

Generalized stratigraphic model showing relative positions of the major facies belts and their relation to the grand cycles (Cordilleran Miogeocline to Interior Platform). (Modified from Aitken, 1978).

Figure 8.4

Schematic stratigraphic column of platform formations of the Sauk sequence of the southern Rocky Mountains, showing grand cycles, generalized lithology and biostratigraphic zonation. Not to scale. (After Aitken, 1989b).

Figure 8.5

Diagrammatic stratigraphic cross section of the Cathedral carbonate lithosome, a body of Middle Cambrian platformal carbonate rock that is regional in extent and surrounded by siliciclastic mudrocks. The lithosome, the upper part of the Mount Whyte - Cathedral grand cycle, is abruptly terminated in the west, becomes extremely attenuated in the east, is strongly diachronous at its base, and has a near-synchronous upper surface. (From Aitken, 1989a).

Figure 8.6

Schematic east-west diagram of Cambrian and Lower Ordovician formations in the southern Rocky Mountains and southern plains of Alberta and Saskatchewan. The diagram trends across strike and its datum is the top of the Pika Formation and its equivalents. The diagram is not to scale. The line of section extends from near Field, British Columbia to near the Saskatchewan River in central Saskatchewan (approximately 1000 km).

Figure 8.7

Schematic north-south diagram of Cambrian and Lower Ordovician formations of the Rocky Mountains, from northern British Columbia to the Canada-United States border. Diagram follows the strike of the platform facies. Its datum is the Pika Formation and its equivalents. The diagram is not to scale. The line of section extends from the Roosevelt Graben, west of Fort Nelson, British Columbia, to the Waterton-Flathead area of southernmost Alberta and British Columbia (approximately 1300 km).

Figure 8.8

Regional cross section A* - A', northwest to southeast, Peace-Athabasca Arch to Williston Basin.

Figure 8.9

Regional cross section D° - D', southwest to northeast, Rocky Mountains (Jasper area) to north-central Saskatchewan.

Figure 8.10

Regional cross section J - J', west to east, Rocky Mountains (Banff area) to the Alberta-Saskatchewan boundary.

Figure 8.11

Regional cross section F° - F', west to east, Rocky Mountains (Waterton-Flathead area) to eastern Saskatchewan.

Figure 8.12

Regional cross section H - H', north to south, western plains and foothills.

Figure 8.13

Regional cross section L - L', north to south, central plains along the Alberta-Saskatchewan boundary.

Figure 8.14

Regional cross section G - G*, southwest to northeast, eastern plains of Saskatchewan.

Figure 8.15

Cross section K - K', west to east, Hay River Embayment, northeastern British Columbia and northwestern Alberta.

Figure 8.16

Reference log: Aquitaine - Mobil Cutoff 5-7 (5-7-35-11W5). Standard Atlas vertical scale, 1:3000.

Figure 8.17

Reference log: Pan-Canadian Petroleum Entice 9-6 (9-6-28-23W4). Standard Atlas vertical scale, 1:3000.

Figure 8.18

Reference log: British American et al. Canmer 6-9 (6-9-31-1W4). Standard Atlas vertical scale, 1:3000.

Figure 8.19

Isopach map of the total Cambrian and Lower Ordovician succession.

Figure 8.20

Isopach and lithofacies map for the Middle Cambrian succession.

Figure 8.20a

Distribution of Middle Cambrian sandstones, as a percentage of total thickness.

Figure 8.20b

Distribution of Middle Cambrian siltstones, as a percentage of total thickness.

Figure 8.20c

Distribution of Middle Cambrian shales, as a percentage of total thickness.

Figure 8.20d

Distribution of Middle Cambrian carbonates (limestones and dolomites combined), as a percentage of total thickness.

Figure 8.21

Isopach and lithofacies map for the Upper Cambrian and Lower Ordovician succession.

Figure 8.21a

Isopach and lithofacies map for the Upper Cambrian and Lower Ordovician succession. (sandstone)

Figure 8.21b

Isopach and lithofacies map for the Upper Cambrian and Lower Ordovician succession. (siltstone)

Figure 8.21c

Isopach and lithofacies map for the Upper Cambrian and Lower Ordovician succession. (shale)

Figure 8.21d

Isopach and lithofacies map for the Upper Cambrian and Lower Ordovician succession. (carbonate)

Figure 8.22

Structure contour map on the top of the Cambrian-Lower Ordovician succession. Subcrop paleogeology is indicated by the colour coding of the control wells.