12 
Most of this bed was originally almost a calcareous coquina, so full of 
fossils is it, but all are now entirely silicified. Borne quartz sand grains 
were mixed with the shells. The bed is well exposed for collecting along both 
sides of the road, a few yards in from its edge. The bed projects out into 
the road from the north as a very light grey ledge, a foot wide, 40 feet west 
of the black ridge of locality 12. 
(11) Beds of quartzite alternating with dolomitic conglomerate which weathers 
light grey and contains many pebbles, up to 2 inches in diameter, of reddish and 
grey quartzite . , 22 feet 
(12) A thin-bedded limestone, with chert in nodules and bands, and a few 
thin bands of quartzite. It is unevenly bedded. The topmost layer is a 3-foot 
bed of conglomeritic quartzite, composed mostly of rounded quartzite and dolo- 
mitic limestone pebbles up to 6 inches in diameter; it is very resistant and forms 
a prominent ridge which is the conspicuous black ridge just east of the point where 
the reddish shales end on the Bankhead-Minnewanka Lake road. 20 feet 
(13) Alternating quartzites and limestones. The upper 6$ feet is a heavy 
bed of quartzite, and 38 feet from the base are 19 feet of quartzites, with a few thin 
dolomitic bands included 
(14) Solid bed of light grey quartzite 
96 feet 
2 feet 
This bed forms the top of a prominent ridge as it is overlain by softer 
limestones. It is very full of external and internal moulds of fossils; when 
deposited nearly one-half of its mass must have been composed of shells. 
Brachiopods are largely confined to the upper foot and pelecypodsto the lower 
foot, yet there appears to be no corresponding difference in the rock itself. 
(15) Light grey, heavy-bedded quartzites 150 feet 
Thirty feet above the base is the western edge of the road where it 
crosses the bridge over Cascade river. 
(16) Alternating thin-bedded quartzites and limestones 94 feet 
(17) Quartzite (this stratum is an excellent horizon marker for following 
across the country) 12 feet 
(a) Thin-bedded quartzite weathering shaly 7 feet 
(b) A heavy bed of reddish grey quartzite 5 feet 
(18) A fight grey limestone very full of large, light grey chert nodules arranged 
parallel with the beading. This weathers back rapidly, causing the beds above 
and below to stand out as ridges 11 feet 
In the upper part of this bed are a few specimens of Zaphrentoid corals 
and Spirifers. These are all coarsely silicified, with consequent loss of detail. 
(19) Alternation of light grey dolomites and quartzites, extending to near 
the base of the bluff at the north edge of the junction of Devils creek with Cascade 
river. The upper limestone beds are conspicuously seamed with thin white 
quartz bands, an eighth of an inch thick; these are especially conspicuous at 
right angles to the bedding plane. A few rows of grey chert nodules are present 
and along some bedding planes, especially the upper ones, these take the form of 
finely disseminated quartz particles .97*5 feet 
(a) A light grey limestone, with few chert nodules. It includes a 4-inch 
quartzite band 3 feet above the base. Strike north 53 degrees west; 
dip 33 degrees southwest 16*5 feet 
(b ) Thin-bedded quartzite, with a considerable number of iron nodules so 
that the beds weather reddish 5*5 feet 
(c) Cherty grey limestone 1-5 feet 
(d) A heavy bed of quartzite 5 feet 
(e) Light grey limestone. This erodes rapidly by shaling across the bedding 
plane 3*5 feet 
(f) A light grey limestone 30 feet 
(g) Cherty quartzite, weathering reddish 2*5 feet 
(h ) Grey limestone, with small, scattered chert nodules 33 feet 
