The Noonday occurrence is located at the head of Cascade Creek at 2200 metres elevation above sea level in the Slocan Mining Division. The prospect is on the ridge between Cascade and Mat creeks on the old Comstock claims.

Regionally, the area lies within the Selkirk Mountains of southeastern British Columbia. The occurrence is within the Kootenay Arc, a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic Horsethief Creek Group, the Upper Proterozoic to Lower Cambrian Hamill Group, the Lower Cambrian Badshot Formation, and the Paleozoic Lardeau and Milford groups. The volcano-sedimentary sequence is intruded by numerous Paleozoic to Mesozoic granitoid plutons and has been metamorphosed to at least middle greenschist facies before the emplacement of the mineralization.

The oldest rocks on the Comstock property are tuffaceous andesite and flows of the Index Formation of the Lardeau Group. A northwest-trending fault which passes through the centre of the Comstock property separates the volcanic rocks of the Index Formation from sandstone, siltstone and phyllite of the Broadview Formation to the west. The rocks are deformed in a series of northwest-trending folds that are cut at oblique angles by faults.

The Noonday occurrence consists of a quartz vein 1.5 metres wide that strikes 342 degrees and dips 25 degrees northeast. The vein is emplaced in fine-grained arenites of the Broadview Formation just below an aplite dike. The vein is composed of white milky quartz with smoky grey bands. Subhedral galena grains, 2 millimetres wide, are disseminated and concentrated in small patches with minor sphalerite crystals. Selected grab samples from the vein assayed up to 663 grams per tonne silver and 33.1 per cent lead (Assessment Report 18149). The vein has been explored by several surface trenches and at least two adits driven for a total length of 105 metres.