DCHP-1 Online
demoiselle [< Cdn F] 
n. a curiously-shaped pillar of clay, or cemented gravel, or other material, caused by erosion.
See also: hoodoo (def. 3) pingo (def. 2)
- 1940 In Hoodoo Valley opposite Leanchoil rain-water has cut the cemented boulder clay into fantastic forms called "hoodoos" or "demoiselles" similar to those in Banff and Jasper Parks.
- 1952 In places along Medicine Lake highway the thick deposits of glacial drift or boulder clay have been cut into high, fantastic earth pillars called "hoodoos" or "demoiselles," similar to those near Banff. Demoiselles
- 1940 In Hoodoo Valley opposite Leanchoil rain-water has cut the cemented boulder clay into fantastic forms called "hoodoos" or "demoiselles" similar to those in Banff and Jasper Parks.