The Palliser Formation is a

stratigraphic Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostrati ...

unit of

Late Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, wher ...

(

Famennian The Famennian is the latter of two faunal stages in the Late Devonian Epoch. The most recent estimate for its duration estimates that it lasted from around 371.1 million years ago to 359.3 million years ago. An earlier 2012 estimate, still used b ...

)

age Age or AGE may refer to: Time and its effects * Age, the amount of time someone or something has been alive or has existed ** East Asian age reckoning, an Asian system of marking age starting at 1 * Ageing or aging, the process of becoming older ...

in the

Western Canada Sedimentary Basin The Western Canadian Sedimentary Basin (WCSB) underlies of Western Canada including southwestern Manitoba, southern Saskatchewan, Alberta, northeastern British Columbia and the southwest corner of the Northwest Territories. This vast sedimentary ...

. It is a thick sequence of

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

and

dolomitic Dolomite () is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite. An alternative name sometimes used for the dolomiti ...

limestone that is present in the

Canadian Rockies The Canadian Rockies (french: Rocheuses canadiennes) or Canadian Rocky Mountains, comprising both the Alberta Rockies and the British Columbian Rockies, is the Canadian segment of the North American Rocky Mountains. It is the easternmost part ...

and foothills of western Alberta. Tall cliffs formed of the Palliser Formation can be seen throughout Banff and

Jasper National Park Jasper National Park is a national park in Alberta, Canada. It is the largest national park within Alberta's Rocky Mountains spanning . It was established as a national park in 1930 and declared a UNESCO World Heritage Site in 1984. Its locatio ...

s. The formation was named for the

Palliser Range The Palliser Range is a mountain range of the Canadian Rockies that lies in the extreme southeast corner of Banff National Park, Alberta, Canada. The Palliser Range is part of the East Banff Ranges of the Central Front Canadian Rockies. Lake ...

in Banff National Park (which in turn took its name from

John Palliser John Palliser (29 January 1817 – 18 August 1887) was an Irish-born geographer and explorer. Following his service in the Waterford Militia and hunting excursions to the North American prairies, he led the British North American Explorin ...

, the leader of the 1850s Palliser Expedition), by H.H. Beach in 1943.Beach, H.H., 1943. Moose Mountain and Morley map-areas, Alberta;

Geological Survey of Canada The Geological Survey of Canada (GSC; french: Commission géologique du Canada (CGC)) is a Canadian federal government agency responsible for performing geological surveys of the country, developing Canada's natural resources and protecting the en ...

, Memoir 236, 74 p. The type locality was defined in 1994 in the "Devil's Gap" section south of Mount Costigan of the Palliser Range, north of

Lake Minnewanka Lake Minnewanka () ("Water of the Spirits" in Nakoda) is a glacial lake located in the eastern area of Banff National Park in Canada, about northeast of the Banff townsite. The lake is long and deep, making it the 2nd longest lake in the mou ...

.Meijer Drees, N.C. and Johnston, D.I. 1994. Type Section and conodont biostratigraphy of the Upper Devonian Palliser Formation, southwestern Alberta. Bulletin of Canadian Petroleum Geology. 42:1. P 55-62.

Lithology and paleontology

The Palliser Formation was deposited in a marine environment as an extensive carbonate shelf. It is subdivided into the Morro Member (the lower part) and the Costigan Member (the upper part). The Morro Member consists of massive, fine-grained limestone and dolomitic limestone. It contains remains of

brachiopod Brachiopods (), phylum Brachiopoda, are a phylum of trochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs. Brachiopod valves are hinged at the rear end, w ...

crinoid Crinoids are marine animals that make up the class Crinoidea. Crinoids that are attached to the sea bottom by a stalk in their adult form are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, which are ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

ostracod Ostracods, or ostracodes, are a class of the Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 70,000 species (only 13,000 of which are extant) have been identified, grouped into several orders. They are small crustaceans, typic ...

s and conodont elements. The Costigan Member is less dolomitic, more

argillaceous Clay minerals are hydrous aluminium phyllosilicates (e.g. kaolin, Al2 Si2 O5( OH)4), sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces. Clay minerals ...

, and more

fossiliferous A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in ...

than the Morro. It contains remains of brachiopods, crinoids, conodont elements,

nautiloid Nautiloids are a group of marine cephalopods ( Mollusca) which originated in the Late Cambrian and are represented today by the living ''Nautilus'' and ''Allonautilus''. Fossil nautiloids are diverse and speciose, with over 2,500 recorded species ...

bryozoa Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about long, they have a special feeding structure called a l ...

ns, stromatoporoids and

stromatolite Stromatolites () or stromatoliths () are layered sedimentary formations (microbialite) that are created mainly by photosynthetic microorganisms such as cyanobacteria, sulfate-reducing bacteria, and Pseudomonadota (formerly proteobacteria). The ...

Anhydrite Anhydrite, or anhydrous calcium sulfate, is a mineral with the chemical formula CaSO4. It is in the orthorhombic crystal system, with three directions of perfect cleavage parallel to the three planes of symmetry. It is not isomorphous with the ...

beds can be present in both members.Glass, D.J. (editor) 1997. Lexicon of Canadian Stratigraphy, vol. 4, Western Canada including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba. Canadian Society of Petroleum Geologists, Calgary, 1423 p. on CD-ROM. .

Distribution and thickness

The Palliser Formation is present throughout the main and front ranges of the Canadian Rockies, where it reaches a maximum thickness of , as well as in the subsurface in the foothills, where it is up to thick.

Relationship to other units

The Palliser Formation is disconformably overlain by the Exshaw Formation and conformably underlain by the Alexo Formation. It is equivalent to the Wabamun Group in

central Alberta Central Alberta is a region located in the Canadian province of Alberta. Central Alberta is the most densely populated rural area in the province. Agriculture and energy are important to the area's economy. Geography Central Alberta is bordere ...

, to the middle part of the Three Forks Formation in

Saskatchewan Saskatchewan ( ; ) is a Provinces and territories of Canada, province in Western Canada, western Canada, bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and on t ...

and

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

and to the

Tetcho Formation The Tetcho Formation is a stratigraphical unit of Famennian age in the Western Canadian Sedimentary Basin. It takes the name from Tetcho Lake, and was first described in the ''Imperial Island River No. 1'' well (located south of Trout Lake by ...

and Kotcho Formation in the Fort Nelson area of

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

Economic resources

Limestone quarried from the Palliser Formation is used to manufacture

cement A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel ( aggregate) together. Cement mix ...

Exshaw Exshaw is a hamlet in Alberta, Canada within Municipal District (MD) of Bighorn No. 8. Located approximately west of downtown Calgary and east of Canmore, Exshaw is situated within the Bow River valley north of the Bow River. The hamlet was ...

, Alberta.Leckie, D.A. 2017. Rocks, ridges and rivers – Geological wonders of Banff, Yoho, and Jasper National Parks, p. 47. Brokenpoplars, Calgary, Alberta, 217 pp. .

References

{{Western Canadian Sedimentary Basin, Canadian Rockies=yes Geologic formations of Alberta Devonian Alberta Devonian southern paleotropical deposits Famennian Stage Dolomite formations Limestone formations Shallow marine deposits Fossiliferous stratigraphic units of North America Paleontology in Alberta