This well, on the west shore of Hudson Bay, has penetrated a relatively thick (2913 ft) Phanerozoic section, including Devonian strata hitherto postulated as present in Hudson Bay Basin. Three broad units exist, called Lower Carbonate, Middle Clastic, and Upper Carbonate. The first is dominantly limestone and dolomite 2490 feet thick, resting on Precambrian crystallines. Fauna indicate that it contains temporal equivalents of the Late Ordovician Bad Cache Rapids and Churchill River groups, Early Silurian Port Nelson, and Middle Silurian Severn River, Ekwan River, and Attawapiskat formations. The middle unit, 653 feet thick and mainly red siltstone, is unfossiliferous but tentatively equated with Late? Silurian Kenogami River Formation. The upper unit is 400 feet of limestone correlated with Middle Devonian Abitibi River Formation.