The book is patterned upon a course in Principles of Geomorphology which the author has taught for several years. Students in this course presumably have had, in addition to beginning geology, courses in mineralogy and petrology.
Numerous sections have been rewritten and considerable new material has been added in the third edition.

Changes which have been made have improved the quality of the book.

References at the end of chapters will enable students to pursue more fully particular phases of the subject which may appeal to them.