Unit Name: Minto Inlet Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: Neohelikian - Hadrynian (1269 - 542 ma)
Province/Territory: Northwest Territories; Nunavut
Originator: Thorsteinsson and Tozer, 1962.
Type Locality:
Head of Minto inlet, Victoria Island.
Distribution:
In the type area, the composite thickness is about 366 m, thinning to the northeast, where it decreases to about 213 m south of Glenelg Bay and less than 90 m at the west entrance to Hadley Bay. The formation is exposed only in the Shaler Mountains of Victoria Island.
Lithology:
Predominantly white, thinly bedded gypsum and anhydrite intercalated with varicolored, thin beds of variably argillaceous and calcareous sandstone, aphanitic to fine-grained dolomite and variably calcareous siltstone.
Relationship:
Conformably overlies the Reynolds Point Formation, overlain with abrupt conformable contact by the Wynniatt Formation. The formation is extensively intruded by gabbro sills and dykes.
Other Citations:
Thorsteinsson and Tozer, 1961, 1962; Young, 1977; Aitken, Long and Semikhatov, 1978.
Source: CSPG Lexicon of Canadian Stratigraphy, Volume 1, Arctic Archigelage (District of Franklin); R.L. Christie, A.F. Embry, G.A. Van Dyck (editor)
Contributor: J.D. Aitken; F. Alexander
Entry Reviewed: Yes
Name Set: Lithostratigraphic Lexicon
LastChange: 29 Apr 2003