Cypress Hills Formation

Cypress Hills Formation
Stratigraphic range: Oligocene

PreЄ

Є

O

S

D

C

P

T

J

K

Pg

N
Cypress Hills Formation; Stratigraphic range: Oligocene PreЄ Є O S D C P T J K Pg N
Type	Geological formation
Underlies	erosional surface
Overlies	Ravenscrag Formation
Thickness	up to 80 metres (260 ft)[1]
Lithology
Primary	Gravel, sand
Other	Conglomerate, marl
Location
Coordinates	49.59399°N 108.79573°W
Region	WCSB
Country	Canada
Type section
Named for	Cypress Hills
Named by	Williams and Dyer, 1930

The Cypress Hills Formation is a stratigraphical unit of Oligocene age in the Western Canadian Sedimentary Basin.

It takes the name from the Cypress Hills, and was first described in outcrops on the slopes of the Cypress Hills by M.Y. Williams and W.S. Dyer in 1930.[2] Type localities are found at Anxiety Butte in south-western Saskatchewan, as well as hill slopes in south-eastern Alberta.

Lithology

The Cypress Hills Formation is composed of loose quartzitic gravel and sand, occasionally conglomerate and marl. [1]

Distribution

The Cypress Hills Formation reaches a maximum thickness of 80 metres (260 ft) in the sub-surface in Saskatchewan, and is typically 40 metres (130 ft) thick.[1] It occurs in the elevated Cypress hills, as well as in several plateau remnants in south-eastern Saskatchewan, south of the Frenchman River.

Relationship to other units

The Cypress Hills Formation forms the present day erosional surface, or may be covered by Laurentian Drift and loess. It conformably overlays the Ravenscrag Formation.[1]

It is equivalent to the Swift Current Creek Formation in southern Saskatchewan.

References

Lexicon of Canadian Geologic Units. "Cypress Hills Formation". Archived from the original on 2013-02-22. Retrieved 2010-01-30.
Williams, M.Y. and Dyer, W.S., 1930. Geology of southern Alberta and southwestern Saskatchewan; Geological Survey of Canada, Memoir 163.

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[lexicon-1] Lexicon of Canadian Geologic Units. "Cypress Hills Formation". Archived from the original on 2013-02-22. Retrieved 2010-01-30.

[2] Williams, M.Y. and Dyer, W.S., 1930. Geology of southern Alberta and southwestern Saskatchewan; Geological Survey of Canada, Memoir 163.

Western Canadian Sedimentary Basin
Hydrocarbon history	Oil sands and heavy oil Frontier exploration and development Natural gas liquids Natural gas
Depositional regions	Southern Alberta Central Alberta Northwestern Alberta Plains South-central Canadian Rockies foothills North-east Plains North-central foothills Liard River Fort Nelson Northern Rocky Mountains Fort St. John Saskatchewan Western Manitoba
Southern Alberta plains	Cypress Hills FM Porcupine Hills FM Ravenscrag FM Edmonton GRP Belly River GRP Oldman FM Foremost FM Pakowki FM Milk River FM Colorado GRP Mannville GRP Ellis GRP Swift FM Rierdon FM Sawtooth FM Rundle GRP Banff FM Exshaw FM Bakken FM Wabamun FM Crowfoot FM Nisku FM Ireton FM Leduc FM Cooking Lake FM Beaverhill Lake GRP Elk Point GRP Canadian Shield
Saskatchewan	Cypress Hills FM Ravenscrag FM Frenchman FM Whitemud FM Eastend FM Bearpaw FM Judith River GRP Belly River FM Oldman FM Foremost FM Lea Park FM Pakowki FM Milk River FM Colorado GRP Viking FM Mannville GRP Pense FM Cantuar FM Success FM Vanguard FM Ellis GRP Swift FM Rierdon FM Sawtooth FM Shaunavon FM Piper FM Gravelbourg FM Gypsum Springs FM Watrous FM Big Snowy GRP Madison GRP Charles FM Poplar Ratcliffe Midale Mission Canyon FM Kisbey SS Alida Tilston Lodgepole FM Souris Valley Three Forks GRP Bakken FM Big Valley FM Torquay FM Saskatchewan GRP Birdbear FM Duperow FM Manitoba GRP Souris River FM Elk Point GRP Davson Bay FM Prairie FM Winnipegosis FM Ashern FM Interlake FM Stonewall FM Stony Mountain FM Herald FM Yeoman FM Winnipeg FM Deadwood FM Canadian Shield