The Ash 1 showing is located 35 kilometres west of Vernon, west-southwest of Hudson Bay Lake.

In this area, Middle Jurassic porphyritic granite of the informally named Terrace Creek batholith intrudes Devonian to Triassic sediments of the Harper Ranch Group. Much of the surrounding area is underlain by Eocene volcanic, tuffaceous and sedimentary rocks of the Penticton Group and by Miocene Chilcotin Group olivine basalts.

The K-feldspar porphyritic granite hosts molybdenite mineralization. The mineralization, of possible Jurassic age, occurs in narrow, widely spaced quartz veins and on some joint planes. Small molybdenite rosettes occur in the quartz veins and fracture planes can be weakly mineralized with pyrite clusters and molybdenite blebs. K-feldspar and kaolin alteration occurs along the quartz veins and fractures. The low grade mineralization occurs over a 600 by 300 metre area.

In 1980, Brenda Mines Ltd. carried out geological mapping and soil geochemistry.