ABSTRACT

Castleguard Cave is the longest currently known cavern in Canada (20 km) and the foremost example anywhere of a cavern extending underneath a modern glacier (Figure 1). It displays many striking features of interaction between glaciers and karst aquifers, a complex modern climate, rich mineralization, and a stygobitic fauna that has possibly survived one or more ice ages beneath deep ice cover in the heart of the Rocky Mountains (Ford, 1983).