The Stone showing is located on Breccia Peak and at the head waters of McClair Creek.

The showing is situated within a Mesozoic volcanic arc assemblage which lies along the eastern margin of the Intermontane Belt, a northwest-trending belt of Paleozoic to Tertiary sediments, volcanics and intrusions bounded to the east by the Omineca Belt and to the west and southwest by the Sustut and Bowser basins.

Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Takla Group andesite flows and pyroclastic rocks. Takla volcanics have been intruded by the granodiorite to quartz monzonite Black Lake Suite of Early Jurassic age and are in turn unconformably overlain by or faulted against Lower Jurassic calcalkaline volcanics of the Toodoggone Formation, Hazelton Group.

The dominant structures in the area are steeply dipping faults which define a prominent regional northwest structural fabric trending 140 to 170 degrees. In turn, high angle, northeast-striking faults (approximately 060 degrees) appear to truncate and displace northwest-striking faults. Collectively these faults form a boundary for variably rotated and tilted blocks underlain by monoclinal strata.

The Stone showing is underlain by Takla Group augite porphyry basalt and andesite flows, siltstone, tuffs and andesite dikes, and Toodoggone Formation porphyritic andesite, lapilli tuff, rhyolite and volcanic breccia (McClair Member). These units are intruded by foliated granodiorite of the Early Jurassic Black Lake stock.

Disseminated chalcopyrite and pyrite occurs sporadically throughout the area in all units. Epidote, caused by weak propylitic alteration, is common in the volcanic units. Widespread oxidation has developed large areas of limonite and lesser malachite staining. A grab sample of heavily malachite stained Toodoggone Formation feldspar porphyry from the east side of Breccia Peak assayed 1.79 per cent copper and 42.2 grams per tonne silver (sample 32398, Assessment Report 18338). A sample of rhyolite from the same area assayed 2.4 grams gold and 3.2 grams silver (sample 32405, Assessment Report 18338). These samples are not typical, most yielded much lower values.

Work History

In 1980, the area was prospected and sampled as the Moose 1-4 claim.

In 1986, Cove Energy Corp. completed an airborne geophysical survey on the area. In 1989, a further program of geological mapping and geochemical (rock and soil) sampling was completed on the area as the Cougar III claim.

In 2015, Freeport-McMoran of Canada Ltd. completed a program of geological mapping and rock sampling on the area as the Harmon 1-5 claims.