The Rhyolite Flats showing is hosted in rocks of the Lower Jurassic Telkwa Formation, Hazelton Group. A small Eocene stock of the Coast Plutonic Complex intrudes the strata to the immediate southwest of the area. Extensive masses of quartz diorite of the Middle Jurassic Trapper Plutonic Suite intrude to the north, west and south.

The Rhyolite Flats showing occurs within a package of interbedded rhyolite and andesite volcanics. The overall trend of the system is approximately 50 degrees. Mineralization consists of variable amounts of galena, sphalerite and chalcopyrite along with minor pyrite and malachite located with a fault controlled quartz vein. The best mineralization occurs in the southwest part of the system where a quartz vein/quartz stockwork system occurs.

Trenching has outlined a zone that is 250 metres long by 1 to 4 metre wide. The zone at surface appears to pinch out to the east, while to the west it appears to have been faulted. In comparison to other zones, carbonate within the vein system is minor. Results are generally low, although at the western end of the system a 1 metre intersection averaged 2.29 per cent lead, 4.99 per cent zinc, 8.91 grams per tonne silver, 0.69 gram per tonne gold (Assessment Report 16757).

Sulphides tend to decrease toward the northeast, where the quartz vein takes on a pinker (hematitic) colour coincident with a decrease in sulphides. The southwest extension of the system is drift covered while the zone appears to peter out to the northeast. The Rhyolite Flats showing has not been drilled.

The Pb showing is a 100 by 10 metres zone located approximately 150 metres south of Rhyolite Flats. The showing consists of erratic quartz veins up to 10 centimetres wide in which minor galena and sphalerite (less than 1 per cent combined) along with minor chalcopyrite and pyrite occur. Veins were only traced along strike for approximately 50 metres in quartz-feldspar phyric rhyolites, but lack of outcrop and snow leaves both extensions open. Rhyolite, rhyolite agglomeratic breccias, feldspar phyric andesite flows and a wide magnetic mafic dike also occurs in the immediate area. Results from the 1985 program were largely negative no work was completed in 1986.

Refer to New Moon (093E 011) for related geological and work history details of those showings such as the Rhyolite Flats and Pb showings that occur on the New Moon property.