The name « Harveng » was applied by Sauvé and Bergeron (1965) to a sequence of dolomitic sedimentary rocks located south of Feuilles Lake, SW of Ungava Bay (sheet 24K). The name comes from Harveng Lake, now Deharveng Lake (58°24N; 69°58W, sheet 24K05). Sauvé and Bergeron (1965) referred to the unit as the « Harveng dolomitic schists and dolomites » and the « Harveng formation », but stated that the name Harveng was temporary. Previously, Bergeron (1956) had referred to these same dolomitic rocks by the name « Abner dolomite ». Sauvé and Bergeron (1965) did not want to comment on the possibility that the Harveng Formation was the eastern extension of the Abner Formation (now abandoned) that they had mapped further west. Subsequently, Bélanger (1982) named the unit Harveng Formation.

The rocks of the Harveng Formation outcrop mainly within the Faujas Anticlinorium (Bélanger, 1982; Clark and Wares, 2004), a large NW-SE oriented fold structure south of Feuilles Lake (sheets 24K05 and 24K12). The formation was observed over a NW-SE distance of >50 km. Equivalents of the Harveng Formation may exist north of Feuilles Lake (sheet 24K13). The thickness of the unit was estimated at >200 m by Sauvé and Bergeron (1965). However, since the rocks are strongly folded, the actual thickness of the unit is probably less. Since the formation occupies the axial part of an anticlinorium, its base is not visible. Its top is marked by a transition between dolomitic schists of the Harveng Formation and phyllites of the overlying Baby Formation (Sauvé and Bergeron, 1965).

The Harveng Formation consisted mainly of dolomite, sandy dolomite and dolomitic schist (Sauvé and Bergeron, 1965; Bélanger, 1982). The lower part of the unit consisted of sandy dolomite and, in lesser amounts, pure dolomite (Sauvé and Bergeron, 1965). The upper part consisted of schistose dolomite. Rocks were darker as they approached the contact with the overlying Baby Formation.

Following revision of the Labrador Trough stratigraphic column (Clark and Wares, 2004), the name Harveng Formation was abandoned and rocks of the unit were assigned to the Denault Formation.

The Harveng and Abner formations were recognized as equivalent to the Denault Formation in the southern Labrador Trough (Clark and Wares, 2004). The names Harveng Formation and Abner Formation were therefore abandoned. The Harveng Formation was replaced by the Denault Formation (informal unit pPde3).

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