Three stratigraphic assemblages have been mapped in the area: (1) Upper Palaeozoic sediments and volcanics of the Stikine Assemblage, (2) clastic sediments of the Triassic Stuhini Group, and (3) Lower Jurassic sediments and volcanics of the Hazelton Group.

Four plutonic suites intrude the above; (1) Late Triassic calc-alkaline intrusions coeval with Stuhini Group stratigraphy, (2) Jurassic Copper Mtn, (3) Jurassic Texas Creek and (4) Tertiary Coast Plutonic suite.

The Boundary showing is a massive pyrite vein with minor sphalerite and galena associated with auriferous quartz and K-feldspar-rich hangingwall breccia in altered rhyolite tuff. Gold in soils led to trenching which uncovered the vein with a grade of 5.0 grams per tonne gold over 0.6 metre and the breccia with a grade of 30.79 grams per tonne gold over 1.3 metres (as reported in Assessment Report 29673). The one hole drilled (89-910) intersected a 0.3 metre massive pyrite vein that assayed 1.17 grams per tonne gold over 1.1 metres (as reported in Assessment Report 29673).

The OSC showing occurs about 250 metres west-northwest of the Boundary showing and consists of quartz, K-feldspar, pyrite and chalcopyrite breccia mineralization on a cliff face within dacitic tuffs and lapilli tuffs. Anomalous gold samples taken at the showing ranged from 0.69 to 3.09 grams per tonne gold (as reported in Assessment Report 29673). One drill hole tested the mineralization in 1989 giving no gold grade encouragement.

Refer to Johnny Mountain (Stonehouse) (104B 107) for related details and common property work history.