The Alco area is underlain by mainly by andesitic rocks of the Endako Formation (Nechako Plateau Group) and areas of andesitic rock of the Late Cretaceous Kasalka Group. Felsic rocks of the Ootsa Lake Formation are mapped regionally, north of the Alco property area. Locally, the property is underlain by green vesicular basalts, andesites and flow-banded dacite.

At the Alco showing area is underlain by tan-grey volcano-sedimentary rocks host thin grey quartz veins with minor pyrite and goethite staining. Prospecting and rock geochemistry on the hillsides nearby failed to identify a source in 2012 although abundant host rock outcrop occurs. Gold mineralization in this area is associated with silver (up to 83 grams per tonne) and weakly elevated antimony and anomalous molybdenum. Chip sampling in 2013 yielded chip sample SAK13-208 which assayed 6.5 grams per tonne gold and 28.9 grams per tonne silver (Assessment Report 34508). This chip sample was taken over a 2 by 2 metre area of green altered material.

Locally, the property is underlain by green vesicular basalts, andesites and flow-banded dacite of the Ootsa Lake and Endako Formations, which host narrow fracture zones and breccias with silicate, carbonate and zeolite alteration. Mineralization occurs in the breccias as pyrite and hematite with minor limonite staining.

In 2010, Kootenay Gold Inc. completed a small rock geochemistry program. Highlights include float sample Mk10-389, which assayed 25.9 grams per tonne gold (Assessment Report 32330).

In 2011, Kootenay Gold Inc. conducted rock sampling. Highlights include sample SAK11-191, which assayed 2.5 grams per tonne gold and led to the staking of more ground (Assessment Report 32585).

In 2012, Kootenay Gold Inc. changed their name to Kootenay Silver Inc. and completed a rock geochemistry exploration program on the property. Highlights include sample MK11-413, which assayed 25 grams per tonne silver, and sample MK11-278, which assayed 1.6 grams per tonne gold (Assessment Report 33005). Up to 6 grams per tonne gold obtained at Alco showing area (SAK12-133), apparently from float, as a bedrock source had not yet been discovered.

In 2013, further sampling occurred at the Alco anomaly and resulted in bedrock chip sampling; sampling also occurred to the west of the Alco showing in the area previously defined as Anomaly B, given the name Silver Lake in MINFILE (Assessment Report 34508). A 5.8 kilometres VLF ground electromagnetic survey was conducted in the Alco showing area (Assessment Report 34725).

See the new Silver Lake MINFILE showing 2 to 3 kilometres west of the Alco showing.