Bar River Formation

Unit Name: Bar River Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: Paleoproterozoic (2500 - 1600 ma)
Age Justification: Age from Thurston et al., 1992.
Province/Territory: Ontario

Originator: Frarey, 1967b

Lithology:

The formation is characetrized by mature quartz arenite, with lesser ferruginous arenite and siltstone. Arenites are typically massively bedded, exhibiting cross-bedding and ripple marks, and locally within the finer-grained rocks, mud cracks and dessication features (Thurston et al., 1992, p. 570).

Paleo Environment:

marine, shallow

Relationship:

Belongs to the Cogalt Group, Huronian Supergroup (Thurston et al., 1992). It conformably overlies the Gordon Lake Formation.

Other Citations:

Frarey, M.J., 1967, GSC Paper 67-6, p. 2.

References:

Frarey, M.J., 1967b. Three New Huronian Formational Names; Geological Survey of Canada, Paper 67-06, 3 p.

Thurston, P.C., Williams, H.R., Sutcliffe, R.H. and Stott, G.M. 1992. Geology of Ontario; Ontario Ministry of Northern Development and Mines, Ontario Geological Survey Special Volume 4, 1525 p.

Source: Murray Frarey's Precambrian Lexicon
Contributor: P.H. Davenport
Entry Reviewed: No
Name Set: Lithostratigraphic Lexicon
LastChange: 12 Mar 2009