Unit Name: Bathurst Group
Unit Type: Lithostratigraphic
Rank: Group
Status: Formal
Usage: Currently in use
Age Interval: Early Proterozoic (2500 - 1600 ma)
Province/Territory: Nunavut
Originator: Grotzinger et al., 1987.
Type Locality:
The Bathurst Group is best-exposed along the southeastern margin of Bathurst Inlet (Grotzinger et al., 1987).
Distribution:
Contained within the Kilohigok Basin (Grotzinger et al., 1987).
Lithology:
The Bathurst Group contains two formations, the lower Brown Sound Formation (a thick succession of red calcareous mudstones, slump breccia, red siltstone, red arkosic and lithic sandstone and conglomerate, and minor basalt) and the overlying Amagok Formation (a thick succession of arkosic and lithic sandstoens and minor conglomerate) (Campbell and Cecile, 1981; Grotzinger et al., 1987).
Relationship:
The Bathurst Group is part of the Goulburn Supergroup. It overlies the Kuuvik Formation of the Wolverine Group (Grotzinger et al., 1987). The group is unconformably overlain by middle Proterozoic polymictic conglomerates of the Tinney Cove and Ellice formations in the Bathurst Inlet area, as well as to the northeast on Victoria Island and Kent Peninsula (Campbell and Cecile, 1976a; Campbell, 1978, 1979, 1981) (Campbell and Cecile, 1981).
History:
The name Bathurst Group was proposed by Grotzinger et al. (1987) to embrace the previously defined (Campbell and Cecile, 1981) Brown Sound and Amagok formations (Grotzinger et al., 1987).
References:
Campbell, F.H.A. and Cecile, M.P., 1976a. Geology of the Kilohigok Basin, Goulburn Group, Bathurst Inlet, District of Mackenzie, Project 740092; in, Report of Activities, Part A, Blackadar, R.G., Griffin, P.J., and Dumych, Helen (Eds. and Compilers); Geological Survey of Canada, Paper 76-1A, pp. 369-377.
Campbell, F.H.A. and Cecile, M.P., 1981. Evolution of the Early Proterozoic Kilohigok Basin, Bathust Inlet-Victoria Island, Northwest Territories; in, F.H.A. Campbell, ed., Proterozoic Basins of Canada; Geological Survey of Canada Paper 81-10, p. 103-131.
Campbell, F.H.A., 1978. Geology of the Helikian rocks of the Bathurst Inlet area, Coronation Gulf, Northwest Territories; in, Current Research, Part A, Blackadar, R.G., Griffin, P.J., Dumych, H., and Irish, E.J.W. (Eds. and Compilers); Geological Survey of Canada, Paper 78-1A, pp. 97-106.
Campbell, F.H.A., 1979. Stratigraphy and sedimentation in the Helikian Elu Basin and Hiukitak Platform, Bathurst Inlet - Melville Sound, N.W.T.: Geological Survey of Canada, Paper 79-8, 18p.
Campbell, F.H.A., 1981. Stratigraphy and tectono-depositional relatinoships of the Proterozoic rocks of the Hadley Bay area, northern Victoria Island, District of Franklin; in Current Research, Part A, Geological Survey of Canada, Paper 81-1A, p. 15-22.
Grotzinger, J.P., McCormick, D.S., and Pelechat, S.M., 1987. Progress report on the stratigraphy, sedimentology and significance of the Kimerot and Bear Creek groups, Kilohigok Basin, District of Mackenzie; in, Current Research, Part A; Geoloical Survey of Canada, Paper 87-1A, p. 219-238.
Source: GSC file of geological names; T.E. Bolton and J. Dougherty (compiler)
Contributor: P.H. Davenport; Michael Pashulka
Entry Reviewed: No
Name Set: Lithostratigraphic Lexicon
LastChange: 24 Mar 2011