Basaltic rocks of the Vancouver Group, Upper Triassic Karmutsen Formation are overlain conformably by sedimentary Jurassic to Triassic Kunga Group. These are overlain by the Middle Jurassic Yakoun Group intermediate volcanic and volcaniclastic rocks which are overlain by the Tertiary Masset Formation consisting of felsic to intermediate volcanic rocks and intermediate to mafic intrusive rocks. A major 038 degree trending block fault extends along Colinear Creek.

A 2 to 4-centimetre wide quartz vein follows a 055-degree north trending right lateral fault as indicated by drag folding and offsetting of beds in the argillite of the Upper Triassic-Lower Jurassic Sandilands Formation (Kunga Group). The vein also parallels the bedding at 070 degrees north. A 1 to 2.5 centimetre wide sample taken along the vein for a distance of 8 metres assayed 25.4 grams per tonne gold (Assessment Report 14503).