The Holt West occurrence is located in the northern head waters of the Koksilah, approximately 8 kilometres south west of Sahtlam.

The occurrence is underlain by Paleozoic Sicker and Buttle Lake groups volcanics and sediments exposed in a northwest trending syncline. The Nitinat Formation (Sicker Group) forms a sequence of volcanics, volcaniclastics and minor sediments which have undergone pervasive epidotization. These are overlain by pillowed, amygdaloidal and massive basalts which are correlated with the Nitinat to Fourth Lake formations transition (possibly the Duck Lake Formation (Sicker Group)). Epidotization and hemitization are common with minor malachite along fractures. The basalt is overlain by bedded jasper, chert and argillite with minor limestone. The jasper is commonly crosscut by quartz veinlets hosting pyrite, chalcopyrite and magnetite. The matrix commonly hosts specularite. The Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group) overlies the Nitinat Formation and is comprised of well-bedded chert and tuff. Diabase sills (informally known as the Mount Hall Gabbro), coeval with the Upper Triassic Karmutsen Formation of the Vancouver Group, are interlayered with the sedimentary and volcanic rocks. The sills are less than a few tens of metres thick and occupy the core of the major syncline that crosses the property.

Mineralized zones occur near the diabase sills within the Sicker Group rocks. A significant zone, located on Holt 11, occurs in a localized area of epidotized diabase which hosts disseminated to massive pyrite and chalcopyrite with traces of azurite. A sample (2736) assayed 2.36 per cent copper, 0.11 grams per tonne gold and 8.6 grams per tonne silver (Assessment Report 16059).

On Holt 11, five occurrences of mineralized quartz veins in silicified zones near the diabase sills were found (Assessment Report 16059). A sample from a quartz vein assayed 0.497 per cent copper and 0.09 grams per tonne gold. A sample from a silicified mafic tuff with quartz veins assayed 0.9 grams per tonne gold. Another sample from a silicified zone with pyrite, malachite and azurite assayed 0.313 per copper and 0.6 grams per tonne silver.

In 1987, Nexus and Goldenrod resources completed a program of geochemical sampling and geological mapping on the Holt 1-15 claims. In 2006, D. Herriott completed a program of prospecting on the area as the Silver Nugget claims.