A northwest trending metasedimentary sequence of rocks are flanked by Tertiary-Cretaceous Coast Plutonic Complex. The meta- sediments, which consist of pyrite-rich argillaceous quartzite, massive marble, skarn, calc-silicate and siltstone, strike at least 1.5 kilometres and are up to 150 metres wide. They are in contact with biotite quartz monzonite to the east and hornblende quartz diorite to the west.

Several molybdenite bearing quartz veins, up to 5.0 centimetres wide, occur within the quartz monzonite unit.