The Louis showing is located at about 1000 metres elevation on the mountain on the north side of Highway 3, at the west end of Keremeos.
The Louis showing lies within the Quesnel Terrane of the Intermontaine tectonic belt. The Louis showing is hosted within a faulted package of Carboniferous to Permian Kobau and Anarchist groups. To the immediate west are the Carboniferous to Triassic Shoemaker and Old Tom formations. These strata are overlain by Eocene volcanics of the Penticton Group.
The area surrounding this showing is underlain by chert, and argillite with minor tuff of the Shoemaker Formation and the overlying greenstone, volcanic flows and breccias of the Old Tom Formation.
At the Louis showing, rhodonite occurs in the Shoemaker Formation, near the contact between the Shoemaker and overlying Old Tom formations. The rhodonite is associated with jasper.
The Louis showing was staked in 1968 by Union Carbide Exploration Corp. as the Mag 1 to 6 claims. An extensive exploration program of geological mapping and trenching was conducted. Fifty trench samples were taken, but the primary manganese-silicate (rhodonite?) was found to be sub ore-grade (Minister of Mines Annual Report 1968, page 220). There has been some oxidation to manganese oxides near the surface.