The area is underlain by a structurally preseved Paleozoic remnant of a generally shallow marine platform succession over which Proterozoic rocks of both the Purcell and Windermere Supergroups have been thrust. At the base of the Paleozoic succession are thick bedded quartzites and quartz grits of the Lower Cambrian Cranbrook Formation. These in turn are overlain by: dolomites of the Middle Cambrian Jubilee Formation; shale, sandstone and biowacke stones of the Upper Cambrian to Ordovician McKay Group; thick-bedded biowacke stones and peloidal mudstones of the Ordovician and Silurian Beaverfoot Formation; dolomites and dolimitic shales of the Middle Devonian Mount Forster Formation; and thin to medium-bedded dolomitic biowacke stone of the Upper Devonian Starbird Formation.

The Maverick occurrence was first mentioned in 1915 as being about 1 mile (1.6 kilometres) east of the Grotto occurrence (082KNE017). This puts it in roughly the same location as the Falcon showings described in a 1986 report by Cominco.

In 1915, it was reported that a small shipment of silver-lead-zinc ore had been shipped from that location in a previous year. The ore had been extracted from a deep opencut run along the strike of a sheared fracture in limestone. Little evidence of vein matter remained in 1915. A crosscut tunnel was started by W. Nixon and partner in order to prospect the westerly extension of the fracture. The presence of iron-stained float above the fracture was noted at that time.

It is reported that D.L. Pighin of Cominco Ltd. found the Falcon 2 showing in 1975 while mapping the adjacent Grotto property. In 1976, A. Louie staked the Falcon claims around the Falcon 1 and 2 showings. Louie apparently followed up the staking by drilling, blasting and excavating trenches on the showings, although records of this work is not available. Louie investigated barite mineralization on his Falcon (082KNE076) claims in 1982, further to the north. Cominco acquired an option on the Falcon and Mia claims and in 1986 conducted a program of drilling which included 468 metres in three holes, soil sampling (143 taken), rock sampling (19 taken) and mapping.

Cominco described the mineralization as: 1) copper-barite veins in Mount Forster Formation rocks adjacent to a breccia zone which represent the Beaverfoot Formation contact; (2) disseminated sphalerite accompanying barite cementing Beaverfoot fragments in the lower third of the breccia mass; and most importantly as 3) sphalerite and minor galena disseminated within and replacing cavity infilled sediments and breccias in the upper Jubilee Formation. The most significant accumulations of Type 3 occur in the Falcon 1 and 2 breccia zones although minor zinc-lead occurrences are widespread. Veins of coarsely crystalline sphalerite also occur in the crackle brecciated dolomite. Locally, smithsonite has developed from oxidation of the sphalerite. Minor galena and pyrite and low values in silver accompany the sphalerite.

A 17-metre section across the surface of the Falcon 1 breccia assayed 11.1 per cent zinc (Assessment Report 15097). A 1.80-metre chip across the barite cemented Beaverfoot breccia yielded 2.9 per cent zinc and 15.4 per cent barite (Assessment Report 15097).