The Hollebeke Formation is a stratigraphic 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 ...

(

Frasnian The Frasnian is one of two faunal stages in the Late Devonian Period. It lasted from million years ago to million years ago. It was preceded by the Givetian Stage and followed by the Famennian Stage. Major reef-building was under way during th ...

) age. It is present on the western edge of 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 ...

in the southern Rocky Mountains of Alberta and British Columbia. It consists of carbonate rocks, and was named for Mount Hollebeke in the

Flathead Range The Flathead Range is a mountain range of the Northern Rocky Mountains located southeast of Whitefish, Montana in the Great Bear Wilderness, part of the Bob Marshall Wilderness Complex. It is west of the Rocky Mountain Front, east of the Swan Ra ...

near North Kootenay Pass by R.A. Price in 1965.

Thickness and lithology

The Hollebeke Formation was deposited in a marine environment and ranges in thickness from about 100 to 240 m (328 to 787 ft). The lower part consists of locally silty or argillaceous

dolomite Dolomite may refer to: *Dolomite (mineral), a carbonate mineral *Dolomite (rock), also known as dolostone, a sedimentary carbonate rock *Dolomite, Alabama, United States, an unincorporated community *Dolomite, California, United States, an unincor ...

and limestone. The upper part is very fine crystalline limestone.

Distribution and relationship to other units

The Hollebeke Formation is present in Rocky Mountains of southeastern British Columbia and southwestern Alberta, west of the Lewis Thrust Fault and south of about 50°N latitude. It

unconformably An unconformity is a buried erosional or non-depositional surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval o ...

overlies Ordovician or

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

formations, or the late Precambrian Purcell Supergroup, depending on the location. It is overlain by the

Borsato Formation The Borsato Formation is a stratigraphic unit of Late Devonian (Frasnian) age. It is present on the western edge of the Western Canada Sedimentary Basin in the southern Rocky Mountains of Alberta and British Columbia. It consists of dolomite ...

References

{{Western Canadian Sedimentary Basin, Canadian Rockies=yes Geologic formations of Alberta Devonian System of North America Devonian Alberta Frasnian Stage Dolomite formations Limestone formations Shallow marine deposits Western Canadian Sedimentary Basin