The Tuff showing is located on the southeast side of Pokosha Creek, about 750 metres southwest of its confluence with Ashlu Creek.

The area is underlain by granodiorite of the Jurassic Cloudburst pluton of the Coast Plutonic Complex (Geological Survey of Canada Paper 90-1F). A major regional northwest trending shear zone of Cretaceous age, the Ashlu Creek shear zone, occurs to the immediate west.

The Tuff showing consists of a 10 metre wide quartz vein striking 330 degrees and dipping 60 degrees south and containing some 'spectacular aggregates of sulphides' (marcasite and pyrite). The vein occurs at the contact of Lower Cretaceous Gambier Group dacite and granodiorite of the Jurassic Cloudburst pluton (Coast Plutonic Complex).

A 15 metre chip sample over both vein and dacite was reported to have assayed 17.14 grams per tonne gold (Assessment Report 17889). However, subsequent drill, surface and tunnel samples were uniformly low in gold and silver.

An old tunnel, 10 metres in length, shows a good cross-section of the quartz vein at the Tuff showing. The vein is referred to as the George vein.

Quartz float and veining in subcrop, between the main showing area and northward to an exposure in Ashlu Creek, suggests the George vein could be part of a vein system extending up to 1 kilometre. The vein outcrop in Ashlu Creek yielded 4.15 grams per tonne gold (Assessment Report 24036).

The area has been explored in conjunction with the nearby Ashlu mine (MINFILE 092GNW013). In 1988, Valentine Gold Corp, on the behalf of Tenquille Resources, completed a program of geological mapping and rocks sampling. In 1994, 421424 B.C. Ltd. staked the area and Homegold Resources Ltd was retained to prospect and geologically map the claims. During 2009 through 2012, Ashlu Mines completed a program of rock, soil and silt sampling on the area.