A zone of copper-iron sulphide pods hosted in foliated and unfoliated aphanitic basalt flows and calcareous marine sediments is exposed on the north end of Barrier Ridge, east of upper Squaw Creek. Showings are mainly within a contorted basalt-dominated section near the steeply dipping contact with a less deformed package of calcareous to shaly argillite and wacke. Lithologies associated with predominantly dense, locally pillowed, nonmagnetic, aphanitic basalt flows are: interpillow, laminated micrite; massive white to black and green banded chert (exhalite? or tuff); rusty, well laminated cherty argillite; calcareous siltstone and brown to black, fetid limestone. Pods of pyrrhotite are up to 1 by 5 metres in size, but commonly 10 to 30 centimetres. Chalcopyrite typically occurs as blebs or veinlets within pyrrhotite, and locally within basalt and chert where it may comprise up to 2 per cent of the rock over a width of 9 metres. Chalcopyrite veinlets also contain pyrite, calcite and subordinate quartz. The mineralized zone is exposed in a series of trenches within east-flowing creek gullies over a strike length of approximately 200 metres. Continuity across strike is about 50 metres, but due to Quarternary cover, its eastern limit is not known to within a kilometre. Smaller zones of massive sulphide mineralization crop out to the northwest within the stream-bed of the eastern fork of Squaw Creek.

Past exploration on the zone includes six diamond-drill holes totalling less than 200 metres (Bapty, 1968) together with airborne and electromagnetic surveys, but the results of the program are not available. In later years, additional geophysical and geochemical work was done on areas peripheral to or overlapping the Sheep property. These programs were aimed at locating the lode source of the Squaw Creek placers.