The Vermont showing occurs in the vicinity of Mount Sophia. The west half of the mountain is underlain by the Upper Cretaceous Sophie Mountain Formation consisting of conglomerate with thin interbeds of argillite and siltstone. The east half of the mountain is underlain by volcanics of the Lower Jurassic Elise Formation, Rossland Group. Dykes of the Middle Eocene Coryell Intrusions cut the conglomerate.

The showings were reported to contain copper, lead, zinc, silver and gold in significant amounts; presumably the sulphides are chalcopyrite, galena and sphalerite. The conglomerates are reported to contain minor amounts of silver and gold. One sample from the Vermont claims assayed 0.12 per copper, 20.19 per cent lead, 9.32 per cent zinc, 99.77 grams per tonne silver and 0.07 grams per tonne gold (Assessment Report 17718).

In 2006, Major Gold Limited conducted a mineral exploration program on the Portland Project. This included prospecting, grid surveys, soil geochemistry, rock sampling, and magnetometer surveys. Results from the soil grid geochemistry survey and the magnetometer survey showed anomalous gold, silver, copper, arsenic, lead, and zinc patterns correlating to known mineralization on the property.