The Hozameen fault traverses north-northwest separating the low greenschist facies rocks of the Permian-Jurassic Hozameen Complex on the west, from the Lower-Middle Jurassic sediments of the Ladner Group to the east. A Late Cretaceous quartz diorite stock intrudes the sediments along the east side of the Hozameen fault.

The Forks showing lies just west of the fault and is underlain by rocks of the Hozameen Complex comprised mainly of massive greenstone, volcanic chert, argillaceous chert and limestone. The regionally metamorphosed rocks generally contain fine-grained actinolite, epidote, chlorite and locally prehnite.

Reports indicate a small ultramafic pod intrudes the Hozameen Complex greenstones. The highly altered rock probably represents peridotite with segregations of dunite which subsequently have been serpentinized. Petrographic studies in 1938 found this rock to consist almost entirely of olivine with serpentine, presumed to be derived from the olivine, and occasional grains of pyroxene. Fine grains of sulphides, consisting mainly of pyrrhotite, are disseminated throughout this rock.

In 1938, several samples were collected and yielded between 0.2 to 0.4 per cent nickel (Minister of Mines Annual Report 1938, page F8).