The Horn occurrence is exposed on a northwest-trending ridge 6.3 kilometres northeast of Kadah Lake and 3.5 kilometres northwest of the confluence of Horn Creek and the Toodoggone River (Assessment Report 9995). The showing lies within the Omineca-Cassiar mountains in the north-central portion of the Toodoggone gold camp, about 300 kilometres north of the community of Smithers.

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.

Devonian-Permian Asitka Group crystalline limestones are the oldest rocks exposed in the region. They are commonly in thrust contact with Upper Triassic Stuhini Group andesite flows and pyroclastic rocks. These Stuhini rocks have been intruded by plutons and other bodies of the mainly granodiorite to quartz monzonite Early Jurassic Black Lake Suite 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.

Outcrops comprising and surrounding the Horn showing are purple or grey porphyry flows and andesite breccias. Minor intrusive feldspar porphyry dikes and conglomerates occur (Assessment Report 14435). These rocks are assigned to the McClair Member of the Toodoggone Formation. The McClair Member is described in general as heterogeneous lapilli to block tuffs, andesite flows, and numerous cogenetic dikes and plugs, minor mudstone and conglomerate (Bulletin 86). These are intruded by small, localized quartz, hornblende and feldspar porphyritic dikes and subvolcanic intrusions which are contemporaneous with Toodoggone volcanics (Bulletin 86).

Alteration consists of a few narrow bands of pyrite and argillic alteration associated with shear zones or feldspar porphyry dikes. A quartz-chalcedony vein, with malachite staining and disseminated galena, was found at one location. It is not reported whether this vein corresponds to the location of either of two rock samples which yielded anomalous silver. Both samples NM85-8 and -10 consist of rusty, weakly argillic altered volcanics. Sample NM85-8 contained drusy quartz veining and assayed 9.4 grams per tonne silver. Sample NM85-10 had calcite veining with minor malachite staining and assayed 7.5 grams per tonne silver (Assessment Report 14435).

In 1985, the Horn 1-5 claims were held by Norman Resources Ltd. Fieldwork consisted of prospecting, detailed soil sampling, a magnetometer survey and geological mapping.

Refer to Porphyry Pearl (094E 084) which is the main prospect of a property worked on in the mid to late 2000s that contained the Moose 1 (094E 031), Porphyry Pearl, Scree 3 (094E 165), Scree 1 (094E 166), Calf Moose (094E 167), and Horn occurrences. Some related work history for the Horn area is given in the Porphyry Pearl prospect. In 2005, work on the Horn included GIS compilation.