1. William Morris Davis (1850-1934) His Many Faces  Teacher  Geographic Promotion  Institutional Organizer AAG, NGS, GSA  Discipline Founder Geomorphology “The father of American geography”

2. “The Cycle of Erosion” Major Works: “The Rivers and Valleys of Pennsylvania” (1889) + 501 other titles Old IdeaNew Idea http://main.amu.edu.pl/~sgp/gw/wmd/wmdfig.html

3. Sources: Pruyne, John “William Morris Davis: No Erosion of Impact” Online: http://wwwstage.valpo.edu/geomet/histphil/test/davis.html http://wwwstage.valpo.edu/geomet/histphil/test/davis.html Rosenburg, Matt “The Father of American Geography: William Morris Davis” What You Need to Know About Geography Online http://geography.about.com/library/weekly/aa122198.htm http://geography.about.com/library/weekly/aa122198.htm Geogmorphlist, “Models of Landscape Evolution by William Morris Davis” Online: http://main.amu.edu.pl/~sgp/gw/wmd/wmd.html http://main.amu.edu.pl/~sgp/gw/wmd/wmd.html