Situated on the eastern margin of the Coast Mountains, the Ample-Goldmax Property is located west of the Fraser River Fault Zone and its main associated structures, the Bridge River and Yalakom fault systems.  The rocks of these systems belonged to an early turbidite and subduction complex off the coast of North America in the late Paleozoic and early Mesozoic times.  In the Cayoosh Canyon area, surrounding and extending several kilometres westerly from the Ample-Goldmax Property, rocks are divided into two major packages:  the Bridge River Complex and the Cayoosh Assemblage. 

The Bridge River Complex underlies most of the northwest sector of the claim block and consists of Mississippian to Middle Jurassic sedimentary and minor volcanic rocks, including chert, greenstone and argillite, plus a really extensive metamorphic variant, biotite-quartz schists, known as the Bridge River Schists.

The Cayoosh Assemblage consists of metasedimentary rocks, which underlie most of the southeastern portion of the Property.  Overlying the Bridge River Group (or Complex) of volcanic rocks and limestone, the Cayoosh Assemblage consists mainly of poorly bedded, fine-grained dark grey to black mudstone phyllitic argillites, with quartz veins and rusty zones.  Disseminated pyrite and pyrrhotite occur throughout the finer grained rocks.  On closer inspection they reveal refolded folds, kink bands, minor faults, felsic dykes and compositional variation including at least one area of known talc schist, attesting to the structural complexity of the area.  Minor conglomerate sections consist of subrounded to subangular pebbles and cobbles of greenstone. 

On the Property, however, the apparent stratigraphic succession is reversed, with the chert and greenstone rocks of the Bridge River Complex overlying argillitic rocks of the Cayoosh Assemblage.  Due to the similarity in composition, it is often difficult to distinguish the Bridge River Complex rocks from the Cayoosh Assemblage on the Ample-Goldmax Property.  The Bridge River rocks tend to lie in a shallow thrust fault contact over folded phyllite and other rocks of the Cayoosh Assemblage, both on the steep hill north of Highway 99, and on the flanks of Mt. Brew south of Cayoosh Creek, as well as on the Property.  It is this thrust fault contact that is associated with the main mother lode style quartz vein gold showings known and worked on the Property in the past.