View of hoodoo desert erosion in Monument Valley, Arizona. Note that hoodoos are 300 feet high.

Bio/historical note: Frederic Harrison Edmunds was born in Hawarden, North Wales in 1898. He received his B.Sc. (1922) and MSc. (1923) from the University of Liverpool. In 1925 he came to Canada and joined the Department of Soils at the University of Saskatchewan. Professor Edmunds was named chairman of the Department of Geological Sciences in 1961, a position he held until his death in February, 1965.