The formation also hosts deposits of lead, zinc, and silver in the Kicking Horse Pass east of Field, British Columbia. They were discovered in 1884 during the construction of the Canadian Pacific Railway, and are Mississippi Valley-Type (MVT) deposits. They were mined intermittently for more than 60 years. The primary ore minerals are pyrite, sphalerite, and galena, which are associated with dolomite, minor quartz, and calcite. The abandoned mine portals and adits can still be seen along the cliffs that flank the Transcanada Highway.