Natirnaalik Formation
Stratigraphic label: [ppro]na
Map symbol: pPna

First published: 9 February 2016
Last modified:















Translation of original French

Informal subdivision(s)
Numbering does not necessarily reflect the stratigraphic position.
Author:Lamothe, 2007
Reference section:None
Type area:NTS sheet 35G07, between Nituk Lake and Natirnaalik Island
Geological province:Churchill Province
Geological subdivision:Ungava Orogen / Ungava Trough / Southern Domain
Lithology:Sedimentary rocks


Bergeron (1957) and Beall (1960) were the first to mention dolomitic beds near the southern contact of the Cape Smith Belt with Archean bedrock. Taylor (1982) describes it more comprehensively, while Lamothe et al. (1984), Roy (1989) and St-Onge and Lucas (1993) briefly mention the unit.



An allochthonous sedimentary unit located in the basal section of the Southern Domain. It consists of metric dolomite beds, fine-grained and buff-coloured in patina, locally associated with siltstone beds. The rock commonly exhibits quartz veins and concentrated reticular micaceous laminated beds. Too small to be shown on the compilation map, several lenticular beds, ranging in thickness from 30 m to 50 m, were observed near Grunérite Lake (sheet 35H08; Taylor, 1982).


Thickness and Distribution

The Natirnaalik Formation is ~1500 m thick and is located between Nituk Lake and Natirnaalik Island (sheet 35G07). It extends laterally for ~15 km.



Stratigraphic Relationship(s)

The Natirnaalik Formation structurally lies on phyllites and siltstones of the Nituk Formation.


Does not apply.


Author(s)TitleYear of PublicationHyperlink (EXAMINE or Other)
BEALL, G.H.Rapport préliminaire sur la région du lac Laflamme, Nouveau-Québec. Ministère des Ressources Naturelles, Québec; RP 435, 14 pages, 1 plan.1960RP 435
BEALL, G.H.Preliminary report on Laflamme Lake area, Nouveau-Québec. Ministère des Ressources Naturelles, Québec; RP 435(A), 14 pages, 1 plan.1960RP 435(A)
BERGERON, R.Rapport préliminaire sur la zone de Cape Smith – Wakeham Bay, Nouveau-Québec. Ministère des Ressources Naturelles, Québec; RP 355, 9 pages, 2 plans.1957RP 355
BERGERON, R.Preliminary report on Cape Smith – Wakeham Bay Belt, Nouveau-Québec. Ministère des Ressources Naturelles, Québec; RP 355(A), 9 pages, 2 plans.1957RP 355(A)
LAMOTHE, D.Lexique stratigraphique de l’Orogène de l’Ungava. Ministère des Ressources naturelles, 62 pages.2007
ST-ONGE, M.R. – LUCAS, S.B.Geology of the Eastern Cape Smith Belt: Parts of the Kangiqssujuaq, Cratère du Nouveau-Québec, and Lacs Nuvilik map areas, Quebec. Geological Survey of Canada; Memoir 438, 110 pages.1993Source
ROY, C.Géologie de la région du lac Bélanger, Fosse de l’Ungava. Ministère de l’Énergie et des Ressources, Québec; MB 89-13, 117 pages, 1 plan.1989
TAYLOR, F.C.Reconnaissance geology of a part of the Canadian Shield, northern Quebec and Northwest Territories. Geological Survey of Canada; Memoir 399, 32 pages.1982Source


11 novembre 2019