The MONT prospect lies approximately 5 km north of the northeastern end of Stump Lake between Merritt and Kamloops.

The oldest rocks in the area are Upper Triassic Nicola Group mafic alkalic volcanic rocks and sediments. These are intruded by coeval and later calc-alkalic and alkalic bodies, including the Late Triassic Wild Horse batholith to the north. Overlying felsic to basaltic subaerial and lacustrine flows, tuff and breccia of the Kamloops Group host the MONT bentonite prospect within what appears to be a flat lying to east dipping lacustrine basin. The bentonite is interpreted an ignimbritic dacitic volcanic deposit in a lacustrine environment. Sediments, volcanic derived and mudstones, occur in the highest portions of the stratigraphy, which trends from rhyolitic to basaltic, with the bentonitic clay-altered dacites underlain by rhyolite. Kamloops Group and the bentonite zones are locally overlain by Miocene basalt of the Chilcotin Group and Quaternary sediments.

Leopold Lindinger discovered clay deposits in 2014 investigating an airborne EM conductor, magnetic low and resistivity low revealed in a 1994 DIGHEM survey by Canquest Resources Ltd. Lindinger staked the area in 2016 and followed up with mapping and sampling which revealed high purity montmorillonite at 2 locations among other occurrences variably mixed in till. Additional bentonite showings were discovered during a mapping and sampling program in 2017.

In 2018 a work program included a series of test pits up to 8 metres deep, 11 of which encountered bentonite to the depth of the pit, defining a 350 by 250 metre area averaging 8 metres in depth.

A 2019 drill program consisted of 3 vertical holes collared along a 400 metre north-south trend. Two drill holes ended in bentonite at 55 metres depth after entering it between 1 and 4 metres depth. The third ended in non-bentonitic dacite with over 35 metres of bentonite above. Till sheets apparently derived from the north have additional bentonitic lenses, indicating potential in that direction. The deposit is eroded to the south. The intersected clay was interpreted as montmorillonite, derived from a basaltic to dacitic devitrified glass fragment tuff. The average total reported cation exchange capacity values for the clays in holes M-19-01 and M-19-02 are 68.6 and 77.9 respectively. The calculated values are usually less. The clay is described as having relatively high sodium and potentially marketable, though fluorine content is also considered high.

Assessment Report 36983 recommends additional mapping, prospecting and sampling followed by bulk sampling and grid drilling if significant quantities of clay are assessed as marketable.