The Florence prospect is at approximately 1350 metres elevation on the east side of Six-Mile Creek, which drains the lower slope of Nettie L. Mountain into Lardeau Creek. The Florence (L.7051) claim was most likely part of the "Union Jack Group", along with the Union Jack (L.7049) and Jumbo (L.7052) claims in the late 1890s. However, by 1905, it was part of a tenure cluster that also included the Glooscap (L.7257), Glooscap No. 2 (L.7258), Glooscap No. 3 (L.7259), Pilot (L.7050), Pilot Fraction (L.7254), Rattler (L.7048), Rattler No. 1 (L.7251) and Reward Fraction (L.7255). The claims were of interest because they may straddle the projection of the structure that controls the mineralization at Ajax [082KNW099] and Nettie L. [082KNW100].

In 1905, Reward Gold and Silver Mining Company Limited acquired the "Florence Group" of over twenty tenures and started to drive a crosscut to intersect the structure that hosts the Nettie L. mine at considerable depth below surface. In particular, it was looking for the "porphyry dyke" that marks the structure. It is not clear where the adit was collared; however, the intention was to drive it for 1000 metres and it was, in fact, driven for at least 320 metres. In 1917, the Florence "mine" was one of 20 claims included in the "Reward Group", which was then held by the Minnesota Gold and Silver Mining Company. From this, it seems likely that Reward's adit was collared on the Florence claim. Minnesota Gold did some additional development and metallurgical work on what was described as a "milling proposition". At the time, there were reported to be two adits on the property. However, reports written in the 1980s and 1990s fail to mention them.

In the early 1980s, Westmin Resources Limited conducted stream and soil geochemical surveys to the north and west of Lardeau Creek and identified several geochemical anomalies on the lower slopes of Nettie L. Mountain. In 1986, Camfrey Resources Limited followed up some of these anomalies and located the "Jumbo" zone on the Jumbo claim, west of Six-Mile Creek. The following year, it trenched the anomaly. At the same time Nortran Resources Limited and Mulitplex Resources Limited, who also had interests in the area, flew an airborne geophysical survey that including the nearby True Fissure [082KNW030] and Nettie L. [082KNW100] deposits, and located a cluster of encouraging electromagnetic responses. In 1993, Contiki Resources Limited acquired the Jumbo area and also took out an option to acquire 80 percent of Nortran's interest in the Florence and other nearby claims. In 1994, the company completed more grid work on the Jumbo claim and, in 1997, Vision Incorporated resampled a wider area, including the Florence tenure, using a soil auger.

The Trout Lake area is underlain by a thick succession of sedimentary and volcanic rocks of the Badshot Formation and Lardeau Group near the northern end of the Kootenay arc, an arcuate, north to northwest trending belt of Paleozoic and Mesozoic strata that is now classified as a distinct, pericratonic, terrane. The arc rocks are bordered by Precambrian quartzite in the east and they young to the west, where they are bounded by Jurassic-age intrusive complexes. They were deformed during the Antler orogeny in Devonian-Mississippian time and were refolded and faulted during the Columbian orogeny, in the Middle Jurassic. A large panel, the "Selkirk allochthon", was later offset to the northeast by dip-slip motion along the Columbia River Fault.

The Badshot Formation is composed of a thick Cambrian limestone that is a distinctive marker horizon in the Trout Lake area. It is underlain by Hamill Group quartzite and it is overlain by a younger assemblage of limestone, calcareous, graphitic and siliceous argillite and siltstone, sandstone, quartzite and conglomerate, and also mafic volcanic flows, tuffs and breccias, all of which belong to the Lardeau Group. The rocks are isoclinally folded and intensely deformed, but only weakly metamorphosed. They occur as intercalated beds of marble, quartzite and grey, green and black phyllite and schist. Fyles and Eastwood (EMPR BULL 45) subdivided the group into six formations (Index, Triune, Ajax, Sharon Creek, Jowett and Broadview) of which the lowermost (Index) and uppermost (Broadview) are the most widespread. The Triune (siliceous argillite), Ajax (quartzite) and Sharon Creek (siliceous argillite) are restricted to the Trout Lake area. The Jowett is a mafic volcanic unit.

The Nettie L. Ajax, Gyp and other tenures on Nettie L. Mountain cover a northwest trending "ledge", approximately 18 metres wide, that contains quartz-carbonate veins that carry pyrite, galena, sphalerite and chalcopyrite, and values in gold and silver. The surface trace is commonly marked by an oxidized "iron cap" that is readily visible in areas of thin cover. The area is underlain siliceous argillites of the Triune and Sharon Creek Formations, by quartzite of the Ajax Formation and by grits and black phyllites of the lower part of the Broadview Formation. The rocks are folded, deformed and locally highly schistose. The main area of mineralization, encompassing the Gyp, Nettie L. and Ajax mine property, is bounded on the northeast by the Cup Creek fault, on the southwest by the (probably faulted) base of the Broadview Formation, and on the southeast by the Brow Fault. It is 1000 metres long and 200 to 250 metres wide, and covers a portion of the core of the Silver Cup Anticline. This is a regionally important isoclinal fold that is over-turned to the southwest and plunges at 25 degrees to the northwest. It imparts an axial plane cleavage that strikes to the northwest and dips at 60 degrees to the northeast. The rocks are cut by axial plane shears and northeast trending cross faults. One of the latter displaces the anticline between the Nettie L. and Ajax workings. The ore lenses are controlled by faults and drag folds in the core of the fold structure. In the Nettie L. [082KNW100] mine, they are also found in cross faults. The structure is complicated by locally large displacements on post-mineral faults in the plane of the "main lead".

The Florence claim is underlain by isoclinally folded and variably schistose siliceous argillite of the Triune Formation, quartzite of the Ajax Formation and siliceous argillite of the overlying Sharon Creek Formation. The rocks strike to the northwest and dip moderately to steeply to the southwest. There is no specific information available on the geology of the Florence vein area, or of the contents of the workings.