The Summit Lake phosphate occurrence is located near the north side of the Crowsnest Highway and approximately 1.0-kilometre northwest of the north end of Summit Lake.

Regionally, the area is underlain by a series of generally north-trending sedimentary rocks including dolomitic carbonate rocks of the Mississippian Etherington, Mount Head and Livingstone Formations (Rundle Group) and Pennsylvanian to Permian Rocky Mountain Group, fine clastic sedimentary rocks of the Triassic Spray River Group, undivided sedimentary rocks of the Jurassic Fernie Formation and undivided sedimentary rocks of the Jurassic to Cretaceous Kootenay Group.

Locally, an approximately 3-metre thick layer of Permian sandstone overlies Kananaskis or possibly Tunnel Mountain formation strata of the Pennsylvanian Spray Lakes Group. Within the sandstone is a nodular phosphate horizon approximately 1 metre thick. Nodules are 2 to 5 centimetres in size and contain 25.7 per cent P2O5. A grab sample of siltstone with abundant nodules contained 14.5 per cent P2O5 (Open File 1987-16).

In 2019, two float boulder samples (No. 7 and 8) of phosphorite hosted in Fernie Formation shales, taken approximately 600 metres to the south-southeast of the plotted location of the occurrence, yielded 27.20 and 34.49 per cent P2O5 with 0.062 and 0.076 per cent yttrium, respectively (Assessment Report 38493).

Work History

In 2002, a program of geological mapping and rock sampling was completed on the area as the Cro claims. In 2013 and 2014, Fertoz International Organic Inc. conducted programs of prospecting and rock sampling on the area as part of the Crowsnest property. In 2015, High Brix Manufacturing Inc. completed a program of trenching and eight diamond drill holes, totalling 263.9 metres, on the area as a part of the Cro property. In 2019, Fertoz International Inc. conducted a minor program of prospecting and rock sampling on the area as the Summit property. In 2024, Fertoz International Organic Inc. conducted a program of prospecting and rock sampling on the area as a part of the Alexander Creek property.