The Geo occurrence is located on Poole Creek, shown as a tributary of Ubedam Creek (Minister of Mines Annual Report 1926, page 300). Assessment Report 12354 shows Poole Creek to flow into Extravagant Creek, 2.0 kilometres north of Ubedam Creek.

The occurrence consists of a garnet-epidote altered limestone of the Upper Triassic Vancouver Group, Quatsino Formation in contact with granodiorite rocks, presumably belonging to the Jurassic Island Plutonic Suite. Lower Jurassic Bonanza Group volcanics lie to the north of the occurrence.

Mineralization has been exposed by pits and trenches over a distance of 53 metres with a maximum width of 5.0 metres. Mineralization consists predominantly of lenses of chalcopyrite, magnetite, pyrite, pyrrhotite and local arsenopyrite (with which gold is associated), and minor galena, sphalerite, bornite and azurite. The mineralization replaces garnet-epidote skarn. Minor magnetite occurs in crosscutting shear zones.

A sample from a location described as being at elevation 137 metres, 487 metres distance from Tahsis Inlet, assayed 8.2 grams per tonne gold, 34.3 grams per tonne silver, 9.0 per cent copper, and 14.0 per cent zinc (Minister of Mines Annual Report 1923, page 247). Another sample from the Hakadato claim, at elevation 457 metres, 1.8 kilometre from Tahsis Inlet assayed 5.5 grams per tonne gold, 51.5 grams per tonne silver, and 16.0 per cent copper (Annual Report 1925, page 270). These locations are uncertain. A 680-tonne sample assayed 6.17 grams per tonne gold, 13.71 grams per tonne silver and 5.2 per cent copper (Minister of Mines Annual Report 1962, page 104).

George Cross Newsletter #102 (May 28, 1985) reports diamond drilling results that include 3.5 metres of 6.1 grams per tonne gold and 5.85 per cent copper.

In 2006, G. Diakow completed a program of prospecting and rock sampling on the Geo claim. In 2007, Grande Portage Resources completed a regional geochemical program on the Cherry Property. In 2011, Gold Ridge Exploration completed a regional geochemical sampling program on the Tahsis Property. In 2013, 2015 and 2016, Mammoth Geological Ltd. completed programs of prospecting, geological mapping and geochemical (rock, stream sediment and soil) sampling on the North Block (including GEO) and South Block of the Tahsis property for Sojourn Ventures Inc. In 2017, Qualitas Holdings Corp. completed a minor program of rock sampling on the Tahsis property and Mammoth Geological Ltd. completed a NI43-101 Technical Report for the Tahsis property. In 2018 and 2019, Cross

River Ventures Corp. completed a program of soil sampling and a 5.5 line-kilometre induced polarization survey on the Tahsis property.