The LG Foot showing area is underlain by andesitic volcanics and/or sedimentary rocks of the Jurassic Hazelton Group.

In 2017, four grab samples collected by Mountain Boy Minerals' on their Surprise Creek property, near the foot of Long Glacier, over a 200-metre length (north-south). These were extracted from quarts veins that varied from 5 centimeters up to 30 centimetres in width and with unique strikes and dips: 160 degrees strike/90 degrees dip, 90 degrees strike/30 degrees south, 140 degrees strike/shallow south dip and 190 degrees strike/shallow west dip.

The most southerly sample (near cliff) was sample A17-15 that varied from 20 to 30 centimetres in width and contained sporadic amounts of pyrite up to 20 per cent. The sample also had the highest assay at 1.54 grams per tonne gold, 62.2 grams per tonne silver, 0.09 per cent copper, 0.055 per cent lead and 0.31 per cent zinc (Assessment Report 37453). Analyses of the other three grab samples were also significant.

The host rocks of the grab sampled veins were not indicated in the pertinent report. The only rocks types mentioned in the vicinity were from angular float material and described as mudstones and cemented breccias of chert and red limestone. Other angular boulders consisted of limestone/mudstone and andesitic boulders and laminated chert/argillite. Hostrock at the Surp 8 showing to the north were reported to be the black lapilli tuffs and black graphitic argillite.

Refer to Ataman (104A 179) for related geological details and a more complete work history of the Surprise Creek Property.