Unit Name: Bocock Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: late Norian (205.7 - 203.6 ma)
Province/Territory: British Columbia
Originator: Gibson, 1971.
Type Locality:
Headwaters of the north fork of Carbon Creek, in the Peace River Foothills at 55° 41.5'N, 122° 46.25'N, NTS Map 93O/10W Callazon Creek. Formation named after excellent exposures in vicinity of Bocock Peak.
Distribution:
The Bocock Formation ranges in measured thickness from 19.8 m (65 ft) near Bocock Peak, to a maximum of 63.4 m (208 ft) on the north fork of Carbon Creek. The formation is confined to the Rocky Mountain Foothills between Pine Pass and Peace River, although strata of similar composition to the Bocock are present in the Placid-Federal C-29E well, north of Peace River (Gibson, 1975).
Locality Data:
Thickness(m): Minimum 19.8, Maximum 63.4.
Lithology:
Resistant, light grey to yellowish brown weathering, medium- to thick-bedded limestone, which is medium to medium light grey and ranges in texture from aphanitic to coarsely crystalline to bioclastic. No identifiable fossils have been recovered and the age is uncertain, although presumed to be Triassic.
Relationship:
The unit is unconformably overlain by dark grey to black siltstone, shale and limestone of the Jurassic Fernie Formation. It is abruptly and possibly unconformably underlain by dark brownish grey weathering limestone, calcareous and dolomitic siltstone and shale of the Pardonet Formation. The Bocock Formation has no known lateral equivalent.
History:
A newly recognized rock unit between the Fernie and Pardonet formations in the Pine Pass-Peace River area, northeastern British Columbia. Because of the similarity to carbonates of the Triassic Baldonnel Formation, and the contrast in lithology with the Jurassic Fernie Formation the Bocock is considered part of the Triassic succession.
References:
Gibson, D.W., 1971. Triassic Stratigraphy of the Sikanni Chief River-Pine Pass Region, Rocky Mountain Foothills, northeastern British Columbia; Geological Survey of Canada, Paper, 70-31, 105 p.
Gibson, D.W., 1975. Triassic rocks of the Rocky Mountain Foothills and Front ranges of northeastern British Columbia and west-central Alberta; Geological Survey of Canada, Bulletin 247, 42 p.
Source: CSPG Lexicon of Canadian Stratigraphy, Volume 4, western Canada, including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba; D.J. Glass (editor)
Contributor: D.W. Gibson
Entry Reviewed: Yes
Name Set: Lithostratigraphic Lexicon
LastChange: 01 Sep 2009