The Holt 87 occurrence is located west of Holt Creek, approximately 1.5 kilometres northeast of Tadjiss Lake.

The claims are underlain by Paleozoic Sicker Group and Buttle Lake Group volcanics and sediments exposed in a north west trending syncline. The basal Devonian Nitinat Formation (Sicker Group) forms a sequence of volcanics, volcaniclastics and minor sediments that have undergone pervasive epidotization. Overlying these are pillowed, amygdaloidal and massive basalts correlated with the Nitinat to Fourth Lake Formations transition (possibly Duck Lake Formation, Sicker Group). Epidotization and hematization 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 rocks and is comprised of well-bedded chert and tuff.

These Paleozoic rocks are intruded by diorite of the Early to Middle Jurassic Island Plutonic Suite (formerly Island Intrusions) and a series of diabase dikes related to the Upper Triassic Karmutsen Formation (Vancouver Group). Skarnification of layered tuffs adjacent to the intrusive is common.

Locally, cherty argillite hosts 5 to 10 per cent disseminated pyrite.

In 1987, Nexus Resources and Goldenrod Resources completed a program of geochemical sampling and geological mapping on the Holt 1-15 claims. Samples 14671 through 14673 assayed between 4.8 and 7.2 grams per tonne silver (Assessment Report 16059).

In 2006, D. Herriott completed a program of prospecting on the area as the Silver Nugget claims.

In 2018, Island Time Exploration Ltd. completed a program of geological mapping, prospecting, geochemical (soil, silt and rock) sampling and an airborne magnetometer survey on the area as the Holt property.