Unit Name: Evie Member
Unit Type: Lithostratigraphic
Rank: Member
Status: Formal
Usage: Currently in use
Age Interval: Middle Devonian (397.5 - 385.3 ma)
Province/Territory: British Columbia
Originator: Gray, F.F. and Kassube, J.R., 1963.
Type Locality:
Western Natural Gas et al. Fort Nelson a-95-J, in centizone 95, block J, NTS 94-J-10 (northeastern British Columbia), between 2,185.4 and 2,215.9 m (7,170 and 7,270 ft).
Distribution:
The Evie Member is 30.5 m (100 ft) thick in the type well and is well developed toward the northeast north and northwest. It thins to zero to the south, where it is replaced by dolomite of the upper part of the Pine Point Formation on the north flank of the Clarke Lake Field.
Lithology:
Limestone, black, micritic, silty, bituminous, with black impure chert and siliceous black shale and a lower 15.2 m (50 ft) of fissile, black, bituminous, pyritic shale. It is characteristically radioactive on gamma ray logs.
Relationship:
The unit is underlain by the lower part of the Pine Point Formation and overlain by the Otter Park Member (of the Horn River Formation) and, apparently with the bituminous shale and limestone member of the Pine Point in the Great Slave Lake area.
Other Citations:
Belyea and Norris, 1962; de Wit et al., 1973; Gray and Kassube, 1963; Griffin, 1967.
Source: CSPG Lexicon of Canadian Stratigraphy, Volume 4, western Canada, including eastern British Columbia, Alberta, Saskatchewan and southern Manitoba; D.J. Glass (editor)
Contributor: L.V. Hills; A.W. Norris
Entry Reviewed: Yes
Name Set: Lithostratigraphic Lexicon
LastChange: 05 Jul 2004