The Natal claims are located on a ridge above McCulloch Creek and the Goldstream River, approximately 9.8 kilometres east of Lower Arrow Lake.

Regionally, the area is part of the northern upright limb of the Goldstream anticline. Deformed strata exposed there are part of the Index Formation basal black phyllite member, and the overlying Akolkolex Formation. Strata of the intervening upper member of the Index Formation are thin or absent.

Locally, repetitively interlayered thick-bedded quartz and lithic grit, micaceous quartzite, chlorite-(biotite) schist, impure calcitic marble and narrow buff-orange weathering dolomite subunits are grouped into depositional cycles some 10 to 50 metres thick.

Mineralization is hosted in discordant white vuggy quartz veins containing dark green chlorite knots, scattered coarse pyrite euhedra (to 10 per cent) and pyrrhotite blebs/masses cut the country rocks. Where the veins are strongest, they strike north to northwest, dip near-vertically, and attain widths of 0.5 metres or more. The widest veins carry disseminations and pods of galena and dark sphalerite to several millimetres across (2 to 3 per cent combined lead-zinc) and rare finely disseminated chalcopyrite (trace to 1 per cent copper) (Assessment Report 28629).

In 2006, rock sampling returned values up to 0.044 per cent zinc, 2.93 per cent lead and 21.9 grams per tonne silver (sample 19597; Assessment Report 28629)