The International adit is located on the northeast side of Cabin Creek, east of the Canada-Alaska boundary on the Grub Crown Grant (Lot 3924). The 28.0 metre adit was driven in 1919, but failed to intersect predicted mineralization 46.0 metres below surface.

Located in the Intermontane Belt, the area, bounded on the west by the Coast Crystalline Complex and on the east by the Bowser Basin, is part of the Stikinia Terrane.

The showing is hosted by the Upper Triassic to Lower Jurassic Hazelton Group, Unuk River Formation metavolcanics. The Hazelton Group is a northwest trending, steeply east dipping belt of folded andesitic lapilli tuffs, flows and breccia containing a thick se- quence of argillite and siltstone infolded along a synclinal axis. The sequence is intruded by the Early Jurassic Texas Creek plutonic suite of dacitic porphyry dykes and the Eocene granitic Hyder in- trusives.

Mineralization near the adit occurs along the contact between a feldspar porphyry dyke and tuff within a silicified zone. This zone is between 2.4 and 3.0 metres wide, striking 20 degrees northeast with a dip of 63 degrees west. Mineralization consists of stringers of pyrite and galena, and argentite. Within the zone small veins of pure quartz, with different orientations, are reported to carry the highest values. The mineralogy of the vein is reported to be similar to the "Bush" vein (104A 094) which assayed 519 grams per tonne silver in the 1930's.