20 
Minnewanha IAmestone (Upper Part) (Devonian) 
(38) Mostly a dark grey, medium to fine-grained limestone. These beds, 
alternating in hardness, form the conspicuous cliff and slope at the base of the 
Banff shale and immediately above the very pronounced cliff forming the beds 
of the Minnewanka limestone below 300 feet 
(a) A dark grey, almost black, fine-grained, calcareous shale. It weathers 
back more slowly than the beds beneath it and forms the brownish, 
somewhat cliff-like lower limit to the shale of locality 37, but as it con- 
tains some fossils it is here included with locality 38. It is very full of 
iron concretions, some of which may represent replacements of fossils, 
but none was surely identified as such 30 feet 
(b ) Dark grey, vertically shaling limestone, with a few fossils 20 feet 
(c) Grey limestone, medium to fine grained, prolific in fossils 50 feet 
(d) Alternating medium to fine-grained, dark grey limestone. In the upper 
20 feet containing black chert no fossils were seen; the lower 30 feet of 
chert-free beds contain a few fossils. These beds form a conspicuous 
cliff or a series of smaller cliffs, according to the rapidity of erosion, due 
to the more rapid erosion of the black basal beds and the strata of 
locality 38 e. These two series of beds, 38 d and 38 e, form the conspicu- 
ous cliff and slope immediately above the prominent 1,000-foot cliff of 
the Minnewanka limestone 100 feet 
(e) Mostly fine-grained limestone with some beds almost black. This in the 
section takes the observer to the western edge of the gully. Fossils rare 100 feet 
(39) A dense, fine-grained, light grey, heavy-bedded, dolomitic limestone. 
This rock being so much more resistant than those immediately above causes the 
gully in this section to migrate down the dip and hence expose the higher beds of 
locality 39 in a long slope; notwithstanding this, comparatively few fossils were 
noted. This locality continues downward to the very conspicuous “algal” bed. . 140 feet 
(40) A dense, heavy-bedded, fine-grained, light grey dolomite. The majority 
of the beds have an abundance of branching, pencil-like, algal markings. Other 
fossils exceedingly rare. 450 feet 
(41) Rather thin-bedded, brownish-weathering dolomites. These strata 
weather back more readily than those of the preceding locality 60 feet 
Fossils rather abundant, especially in a 5-foot bed near the middle of the 
locality. A few beds contain some algal forms; these beds are as a rule otherwise 
free from fossils. 
(42) Beds similar to those of the preceding locality. Near the base of this 
locality iB a cave zone formed by a medium-grained rock that shales across the 
bedding plane. This takes to the base of mount Standly 100 feet 
The beds are slightly fossiliferous throughout. No algal markings were noted. 
Minnewanka Limestone (Lower Part) ( Devonian ) 
(43) From the foot of the cliff forming locality 42 to locality 44 occurred no 
outcrop in this section. If these beds are normal, with dip similar to that of the 
preceding and succeeding beds, their thickness is about 450 feet. There are rather 
strong indications of minor faulting. This locality goes from the foot of mount 
Standly east to a gully where begins locality 44 450 feet 
(44) Mostly a coarse-grained dolomite 250 feet 
Subdivided as follows: 
(a) A coarse-grained rock yielding a strong odour of hydrogen sulphide 
when struck with a hammer 10 feet 
(b ) Rock similar to above in coarseness of grain and odour but containing 
many branching, algal forms 3 feet 
(c) A coarse-grained rock, weathering with a peculiar pitted appearance. . . 57 feet 
(d) Rock similar to the last but with many geodal cavities lined, or at times 
filled, with calcite crystals. These cavities are usually from a half inch 
to 2 inches in diameter and perfectly round 35 feet 
(e) A fine-grained, thin-bedded rock full of geodal cavities similar to those 
of the last locality but more elongate than in the coarser-grained rock. 
It also contains many calcite veins and at the base algal markings par- 
allel to the bedding 20 feet 
