Unit pPda3 consists of dolomite that is commonly grey and has a light grey (pure dolomite) to buff or yellowish (impure dolomite) alteration patina. Beds are laminated to massive and 1 to 30 cm thick (Clark, unpublished field data). Locally, sedimentary structures such as beach ripples and intraclasts produced by syn-sedimentary slip are observed in dolomite. Rare wavy laminations suggest the presence of stromatolites. Pinkish or buff dolomites having a brown altered patina are rarely seen. The unit includes decimetric to decametric interstratifications of several lithofacies: sericite schist (1-20 cm beds), basalt (beds up to 5 m), chloritic schist (mafic tuff in beds up to 1 m) and pelitic schist (metric beds). Dolomite is commonly cut by millimetre to centimetre-thick quartz veins and lenses.

Unit pAda4 consists of aphyric basalt and plagioclase porphyritic basalt (Clark, unpublished field data). The two lithofacies are typically interstratified in metre-thick layers and have a greenish beige patina. Porphyritic basalt is foliated and contains plagioclase crystals, of variable abundance, being 2 to 5 mm long, locally up to 1.5 cm. Basalt rarely contains pyroxene phenocrysts. Plagioclase phenocrysts are generally aligned parallel with geological contacts. Contacts between the two lithofacies are either transitional (over a few decimetres) or abrupt. Near fault zones, basalt is transformed into chlorite schist. A few thin sills of subophitic to ophitic, medium grained gabbro are associated with these basalts; they are probably synchronous with them. Near faults, gabbro is altered and locally cut by a dense network of centimetric calcite ± actinolite veins.

Unit pPda5 consists of mudstone, slate and siltstone (Dressler, 1979; Clark, unpublished field data). It outcrops in two areas west of Le Moyne Lake over a distance of 25 km (sheets 24C16, 24F01 and 24F02). These rocks are dark grey to black (presence of graphite) and locally contain pyrite disseminated or as laminae.

Unit pPda6 consists mainly of altered dolomitic rocks having an orange patina and containing radioactive minerals. It outcrops west of Le Moyne Lake over a distance of 12 km along a NW-SE axis (sheet 24C16). These dolomites are interbedded with tuffaceous pelites and rhyodacites (Clark, unpublished field data). Beds are centimetre to metre thick. Dolomitic rocks include tuffaceous dolomite, tuffaceous sandy dolomite and polymictic intraformational dolomitic conglomerate. Layers of biotite-chlorite semi-pelite, possibly representing a tuffaceous mudstone, are interbedded with dolomites. Dolomite may also contain rhyodacite interlayers at the contact with unit pPda1. Some dolomitic beds display sorting (finer grained towards the top) with cross bedding at the top. Locally, small clusters and lenses of a bright green chlorite-like mineral are observed. Chlorite veins (locally bright green) and quartz veins cut dolomitic rocks.

Dolomitic conglomerate beds are centimetre to metre thick. Fragments commonly range from 1 mm to 10 cm in length and can reach 30 cm. They are equidimensional or elongated (tablets), with small fragments being very angular. They consist of very fine-grained dolomite, fissile mudstone, fissile siltstone, carbonatite, chert (rare) and granitoid rocks (rare). The composition and proportions of fragments vary from place to place. Fragments are supported by a grey (in fresh exposure) matrix of sandy dolomite or dolomitic sandstone. These conglomerates may represent debris flows.

Unit pPda7 consists of magnetite tuff, lapilli tuff and agglomerates having a mafic composition and greenish to dark grey patina (Clark, unpublished data). It outcrops SE of Douay Lake over a distance of 12 km (sheet 24C16). Volcanic fragments are 1 cm to 60 cm long and are commonly flattened by deformation. Magnetite occurs as disseminated crystals up to 1 mm in diameter. Volcanic rocks are locally light coloured due to strong alteration. Metric interstratifications of dolomite having an orange patina are present.

There is little information available on this conglomerate unit (Dressler, 1979). It appears over a distance of 2 km north of Douay Lake (sheet 24F01).

This unit is located west of Le Moyne Lake and extends over a distance of nearly 20 km (sheets 24F01 and 24F02). All biotite-carbonate ± chlorite schists in the area were originally placed in the « Laporte Group » (Dressler, 1979). However, west of Le Moyne Lake, biotite-carbonate ± chlorite schists are found associated with other informal units of the Douay Formation and basalts of the Murdoch Formation (pPmr1). These schists have been assigned to the Douay Formation (pPda9; Clark and Wares, 2004). According to Dressler (1979), biotite-carbonate ± chlorite schist is fine grained, grey in fresh surface and brownish grey in altered patina. This rock is very easily altered and outcrops are of poor quality. Fine bedding and banding are commonly observed. In thin sections, the rock is composed mainly of biotite, carbonate, plagioclase, quartz and opaque minerals. The carbonate content reaches ~40% of the rock.